En el blog podras ver las respuestas de los examamenes de la certificacion CCNA1
martes, 1 de septiembre de 2009
Examen cisco CCNA1 CAPITULO 5
1
In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
* destination network address
source network address
source MAC address
well known port destination address
2
What information is added during encapsulation at OSI Layer 3?
source and destination MAC
source and destination application protocol
source and destination port number
*source and destination IP address
3
In a connectionless system, which of the following is correct?
The destination is contacted before a packet is sent.
* The destination is not contacted before a packet is sent.
The destination sends an acknowledgement to the source that indicates the packet was received.
The destination sends an acknowledgement to the source that requests the next packet to be sent.
4
Which IP packet field will prevent endless loops?
type-of-service
identification
flags
* time-to-live
header checksum
5
Which portion of the network layer address does a router use to forward packets?
host portion
broadcast address
* network portion
gateway address
6
Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
192.135.250.1
192.31.7.1
192.133.219.0
* 192.133.219.1
7
If the default gateway is configured incorrectly on the host, what is the impact on communications?
The host is unable to communicate on the local network.
* The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
There is no impact on communications.
8
What is the purpose of a default gateway?
physically connects a computer to a network
provides a permanent address to a computer
identifies the network to which a computer is connected
identifies the logical address of a networked computer and uniquely identifies it to the rest of the network
* identifies the device that allows local network computers to communicate with devices on other networks
9
What type of routing uses information that is manually entered into the routing table?
dynamic
interior
* static
standard
10
When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take? (Choose two.)
The router sends an ARP request to determine the required next hop address.
* The router discards the packet.
The router forwards the packet toward the next hop indicated in the ARP table.
The router forwards the packet to the interface indicated by the source address.
* The router forwards the packet out the interface indicated by the default route entry.
11
What are the key factors to consider when grouping hosts into a common network? (Choose three.)
gateways
* purpose
physical addressing
software version
* geographic location
* ownership
12
What is a component of a routing table entry?
the MAC address of the interface of the router
the destination Layer 4 port number
the destination host address
*the next-hop address
13
Which intermediary devices could be used to implement security between networks? (Choose two.)
* router
hub
switch
* firewall
access point
bridge
14
What are three common problems with a large network? (Choose three.)
too few broadcasts
* performance degradation
* security issues
limited management responsibility
* host identification
protocol compatibility
15
Refer to the exhibit. All devices shown in the exhibit have factory default settings. How many broadcast domains are represented in the topology that is shown?
3
* 4
5
7
8
11
16
Which three statements are true about routes and their use? (Choose three.)
If no route to the destination network is found, the packet is returned to the previous router.
* If the destination network is directly connected, the router forwards the packet to the destination host.
If multiple network entries exist for the destination network, the most general route is used to forward the packet. * If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router.
* If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
If a host does not have a route manually configured for the destination network, the host will drop the packet.
17
Refer to the exhibit. A network administrator is troubleshooting a connectivity problem and needs to determine the address that is used to forward network packets out the network. Using the netstat -r command, the administrator would identify which address as the address to which all hosts send packets that are destined for an outside network?
10.10.10.26
127.0.0.1
* 10.10.10.6
10.10.10.1
224.0.0.0
18
Refer to the exhibit. A network administrator notices that there are too many broadcasts on the network. What two steps can the network administrator take to resolve this problem? (Choose two.)
* Replace S2 with a router.
Place all servers on S1.
Disable TCP/IP broadcasts.
* Subnet the 192.168.0.0 /24 network.
Disable all unused interfaces on the switches.
19
Refer to the exhibit. The network in the exhibit is fully operational. What two statements correctly describe the routing for the topology that is shown? (Choose two.)
* 192.168.0.2 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 network to the 172.16.0.0 network.
10.0.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 10.0.0.0 network.
192.168.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 172.16.0.0 network.
172.16.0.1 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 to the 172.16.0.0 network.
* 192.168.0.1 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
192.168.0.2 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
20
What two characteristics are commonly associated with dynamic routing protocols? (Choose two.)
require no device configuration
* provide routers with up-to-date routing tables
require less processing power than static routes require
* consume bandwidth to exchange route information
prevent manual configuration and maintenance of the routing table
21
What statement describes the purpose of a default route?
A host uses a default route to transfer data to another host on the same network segment.
A host uses a default route to forward data to the local switch as the next hop to all destinations.
A host uses a default route to identify the Layer 2 address of an end device on the local network.
* A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.
Examen cisco CCNA1 CAPITULO 4
1
Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)
The local host is using well-known port numbers to identify the source ports.
* A termination request has been sent to 192.135.250.10.
Communication with 64.100.173.42 is using HTTP Secure.
* The local computer is accepting HTTP requests.
192.168.1.101:1042 is performing the three-way handshake with 128.107.229.50:80.
2
After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server?
13
53
* 80
1024
1728
3
Which information is found in both the TCP and UDP header information?
sequencing
flow control
* acknowledgments
source and destination
4
Which is an important characteristic of UDP?
acknowledgement of data delivery
* minimal delays in data delivery
high reliability of data delivery
same order data delivery
5
Refer to the exhibit. Host A is using FTP to download a large file from Server 1. During the download process, Server 1 does not receive an acknowledgment from Host A for several bytes of transferred data. What action will Server 1 take as a result?
create a Layer 1 jam signal
* reach a timeout and resend the data that needs to be acknowledged
send a RESET bit to the host
change the window size in the Layer 4 header
6
Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?
* session establishment
segment retransmit
data transfer
session disconnect
7
Refer to the exhibit. The initial TCP exchange of data between two hosts is shown in the exhibit. Assuming an initial sequence number of 0, what sequence number will be included in Acknowledgment 2 if Segment 6 is lost?
2
3
6
* 1850
3431
3475
8
Why is flow control used for TCP data transfer?
to synchronize equipment speed for sent data
to synchronize and order sequence numbers so data is sent in complete numerical order
* to prevent the receiver from being overwhelmed by incoming data
to synchronize window size on the server
to simplify data transfer to multiple hosts
9
During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?
The packets will not be delivered.
The packets will be retransmitted from the source.
* The packets will be delivered and reassembled at the destination.
The packets will be delivered and not reassembled at the destination.
10
With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?
0 to 255
256 to 1022
* 0 to 1023
1024 to 2047
49153 to 65535
11
Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?
TCP
IP
* UDP
HTTP
DNS
12
What are two features of the User Datagram Protocol (UDP)? (Choose two.)
* flow control
* low overhead
connectionless
connection-oriented
sequence and acknowledgements
13
What mechanism is used by TCP to provide flow control as segments travel from source to destination?
sequence numbers
session establishment
* window size
acknowledgments
14
What is dynamically selected by the source host when forwarding data?
destination logical address
source physical address
default gateway address
* source port
15
Why are port numbers included in the TCP header of a segment?
to indicate the correct router interface that should be used to forward a segment
to identify which switch ports should receive or forward the segment
to determine which Layer 3 protocol should be used to encapsulate the data
* to enable a receiving host to forward the data to the appropriate application
to allow the receiving host to assemble the packet in the proper order
16
Which two options represent Layer 4 addressing? (Choose two.)
identifies the destination network
* identifies source and destination hosts
identifies the communicating applications
* identifies multiple conversations between the hosts
identifies the devices communicating over the local media
17
Which three features allow TCP to reliably and accurately track the transmission of data from source to destination?
* encapsulation
flow control
connectionless services
* session establishment
* numbering and sequencing
best effort delivery
18
Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?
application
presentation
session
* transport
network
19
Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)
This is a UDP header.
* This contains a Telnet request.
This contains a TFTP data transfer.
The return packet from this remote host will have an Acknowledgement Number of 43693.
* This is a TCP header.
20
Which event occurs during the transport layer three-way handshake?
The two applications exchange data.
TCP initializes the sequence numbers for the sessions.
* UDP establishes the maximum number of bytes to be sent.
The server acknowledges the bytes of data received from the client.
to f it devices the best path through the networkThe local host is using well-known port numbers to identify the source ports.
* A termination request has been sent to 192.135.250.10.
Communication with 64.100.173.42 is using HTTP Secure.
* The local computer is accepting HTTP requests.
192.168.1.101:1042 is performing the three-way handshake with 128.107.229.50:80.
2
After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server?
13
53
* 80
1024
1728
3
Which information is found in both the TCP and UDP header information?
sequencing
flow control
* acknowledgments
source and destination
4
Which is an important characteristic of UDP?
acknowledgement of data delivery
* minimal delays in data delivery
high reliability of data delivery
same order data delivery
5
Refer to the exhibit. Host A is using FTP to download a large file from Server 1. During the download process, Server 1 does not receive an acknowledgment from Host A for several bytes of transferred data. What action will Server 1 take as a result?
create a Layer 1 jam signal
* reach a timeout and resend the data that needs to be acknowledged
send a RESET bit to the host
change the window size in the Layer 4 header
6
Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?
* session establishment
segment retransmit
data transfer
session disconnect
7
Refer to the exhibit. The initial TCP exchange of data between two hosts is shown in the exhibit. Assuming an initial sequence number of 0, what sequence number will be included in Acknowledgment 2 if Segment 6 is lost?
2
3
6
* 1850
3431
3475
8
Why is flow control used for TCP data transfer?
to synchronize equipment speed for sent data
to synchronize and order sequence numbers so data is sent in complete numerical order
* to prevent the receiver from being overwhelmed by incoming data
to synchronize window size on the server
to simplify data transfer to multiple hosts
9
During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?
The packets will not be delivered.
The packets will be retransmitted from the source.
* The packets will be delivered and reassembled at the destination.
The packets will be delivered and not reassembled at the destination.
10
With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?
0 to 255
256 to 1022
* 0 to 1023
1024 to 2047
49153 to 65535
11
Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?
TCP
IP
* UDP
HTTP
DNS
12
What are two features of the User Datagram Protocol (UDP)? (Choose two.)
* flow control
* low overhead
connectionless
connection-oriented
sequence and acknowledgements
13
What mechanism is used by TCP to provide flow control as segments travel from source to destination?
sequence numbers
session establishment
* window size
acknowledgments
14
What is dynamically selected by the source host when forwarding data?
destination logical address
source physical address
default gateway address
* source port
15
Why are port numbers included in the TCP header of a segment?
to indicate the correct router interface that should be used to forward a segment
to identify which switch ports should receive or forward the segment
to determine which Layer 3 protocol should be used to encapsulate the data
* to enable a receiving host to forward the data to the appropriate application
to allow the receiving host to assemble the packet in the proper order
16
Which two options represent Layer 4 addressing? (Choose two.)
identifies the destination network
* identifies source and destination hosts
identifies the communicating applications
* identifies multiple conversations between the hosts
identifies the devices communicating over the local media
17
Which three features allow TCP to reliably and accurately track the transmission of data from source to destination?
* encapsulation
flow control
connectionless services
* session establishment
* numbering and sequencing
best effort delivery
18
Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?
application
presentation
session
* transport
network
19
Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)
This is a UDP header.
* This contains a Telnet request.
This contains a TFTP data transfer.
The return packet from this remote host will have an Acknowledgement Number of 43693.
* This is a TCP header.
20
Which event occurs during the transport layer three-way handshake?
The two applications exchange data.
TCP initializes the sequence numbers for the sessions.
* UDP establishes the maximum number of bytes to be sent.
The server acknowledges the bytes of data received from the client.
to identify the source and destination end devices that are communicating
* to identify the processes or services that are communicating within the end devices
21
Select the statements that are correct concerning network protocols. (Choose three.)
* define the structure of layer specific PDU's
dictate how to accomplish layer functions
* outline the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors
Examen cisco CCNA1 CAPITULO 3
* centralized administration
does not require specialized software
* security is easier to enforce
lower cost implementation
provides a single point of failure
2 Which of the following are benefits of peer-to-peer networks? (Choose three.)
centralized security
* easy to create
very scalable
* no centralized equipment required
* centralized administrator not required
centralized control of assets
3 Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)
ASP
FTP
HTML
* HTTP
* HTTPS
IP
4 Which statements are correct concerning the role of the MTA in handling email? (Choose three.)
routes email to the MDA on other servers
* receives email from the client's MUA
receives email via the POP3 protocol
* passes email to the MDA for final delivery
* uses SMTP to route email between servers
delivers email to clients via the POP3 protocol
5 What is the automated service that matches resource names with the required IP address?
HTTP
SSH
FQDN
* DNS
Telnet
SMTP
6 What three protocols operate at the Application layer of the OSI model? (Choose three.)
ARP
* DNS
PPP
* SMTP
* POP
ICMP
7 What are the two forms of application layer software? (Choose two.)
* applications
processes
* services
dialogs
syntax
daemons
8 What are three properties of peer-to-peer applications? (Choose three.)
* acts as both a client and server within the same communication
requires centralized account administration
* hybrid mode includes a centralized directory of files
* can be used in client-server networks
does not require specialized software
centralized authentication is required
9 Which application layer protocols correctly match a corresponding function? (Choose two.)
DNS dynamically allocates IP addresses to hosts
* HTTP transfers data from a web server to a client
POP delivers email from the client to the server email server
SMTP supports file sharing
Telnet provides a virtual connection for remote access
10 Which are valid DNS resource record types? (Choose three.)
* A
* NS
MTA
* MX
FQDN
MAU
11 Which email components are used to forward mail between servers? (Choose two.)
MDA
IMAP
* MTA
POP
* SMTP
MUA
12 What is the primary disadvantage of telnet?
does not support authentication
consumes network bandwidth
utilizes client resources
not widely available
* does not support encryption
requires remote access
13 What are three common HTTP message types? (Choose three.)
* GET
PUSH
* POST
HTML
UPLOAD
* PUT
14 Which of the following are examples of TCP/IP application layer protocols? (Choose three.)
* a terminal emulation protocol that supports remote console connections with various network devices
a protocol created by IBM that makes it easier for mainframes to connect to remote offices
* a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet
a protocol that controls the rate at which data is sent to another computer
* a protocol that exchanges network management information between a network device and a management console
o the 0bterm correctly identifies the device type that is included in the green area?does not require specialized software
* security is easier to enforce
lower cost implementation
provides a single point of failure
2 Which of the following are benefits of peer-to-peer networks? (Choose three.)
centralized security
* easy to create
very scalable
* no centralized equipment required
* centralized administrator not required
centralized control of assets
3 Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)
ASP
FTP
HTML
* HTTP
* HTTPS
IP
4 Which statements are correct concerning the role of the MTA in handling email? (Choose three.)
routes email to the MDA on other servers
* receives email from the client's MUA
receives email via the POP3 protocol
* passes email to the MDA for final delivery
* uses SMTP to route email between servers
delivers email to clients via the POP3 protocol
5 What is the automated service that matches resource names with the required IP address?
HTTP
SSH
FQDN
* DNS
Telnet
SMTP
6 What three protocols operate at the Application layer of the OSI model? (Choose three.)
ARP
* DNS
PPP
* SMTP
* POP
ICMP
7 What are the two forms of application layer software? (Choose two.)
* applications
processes
* services
dialogs
syntax
daemons
8 What are three properties of peer-to-peer applications? (Choose three.)
* acts as both a client and server within the same communication
requires centralized account administration
* hybrid mode includes a centralized directory of files
* can be used in client-server networks
does not require specialized software
centralized authentication is required
9 Which application layer protocols correctly match a corresponding function? (Choose two.)
DNS dynamically allocates IP addresses to hosts
* HTTP transfers data from a web server to a client
POP delivers email from the client to the server email server
SMTP supports file sharing
Telnet provides a virtual connection for remote access
10 Which are valid DNS resource record types? (Choose three.)
* A
* NS
MTA
* MX
FQDN
MAU
11 Which email components are used to forward mail between servers? (Choose two.)
MDA
IMAP
* MTA
POP
* SMTP
MUA
12 What is the primary disadvantage of telnet?
does not support authentication
consumes network bandwidth
utilizes client resources
not widely available
* does not support encryption
requires remote access
13 What are three common HTTP message types? (Choose three.)
* GET
PUSH
* POST
HTML
UPLOAD
* PUT
14 Which of the following are examples of TCP/IP application layer protocols? (Choose three.)
* a terminal emulation protocol that supports remote console connections with various network devices
a protocol created by IBM that makes it easier for mainframes to connect to remote offices
* a protocol responsible for transporting electronic mail on TCP/IP networks and the Internet
a protocol that controls the rate at which data is sent to another computer
* a protocol that exchanges network management information between a network device and a management console
source
end
transfer
* intermediary
16
Which three statements best describe a Local Area Network (LAN)? (Choose three.)
* A LAN is usually in a single geographical area.
* The network is administered by a single organization.
The connection between segments in the LAN is usually through a leased connection.
The security and access control of the network are controlled by a service provider.
* A LAN provides network services and access to applications for users within a common organization.
Each end of the network is generally connected to a Telecommunication Service Provider (TSP).
17
Refer to the exhibit. What type of network is shown?
WAN
MAN
* LAN
WLAN
18
What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
* data representation, encoding, and control
reliability, flow control, and error detection
detailing the components that make up the physical link and how to access it
the division of segments into packets
19
Which characteristic correctly refers to end devices in a network?
manage data flows
originate data flow
* retime and retransmit data signals
determine pathways for data
20
What is the primary purpose of Layer 4 port assignment?
to identify devices on the local media
to identify the hops between source and destination
to identify to the intermediary devices the best path through the network
to identify the source and destination end devices that are communicating
* to identify the processes or services that are communicating within the end devices
21
Select the statements that are correct concerning network protocols. (Choose three.)
* define the structure of layer specific PDU's
dictate how to accomplish layer functions
* outline the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors
Examen cisco CCNA1 CAPITULO 2
1
Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)
Network
Transport
* Physical
Network
Transport
* Physical
* Data Link
Session
2
What is a primary function of the trailer information added by the data link layer encapsulation?
* supports error detection
ensures ordered arrival of data
provides delivery to correct destination
identifies the devices on the local network
assists intermediary devices with processing and path selection
3
During the encapsulation process, what occurs at the data link layer?
No address is added.
The logical address is added.
* The physical address is added.
The process port number is added.
4
What device is considered an intermediary device?
file server
IP phone
laptop
printer
* switch
5
Which layer encapsulates the segment into packets?
physical
* data link
network
transport
6
Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
* determine pathways for data
initiate data communications
* retime and retransmit data signals
originate the flow of data
* manage data flows
final termination point for data flow
7
What can be identified by examining the network layer header?
the destination device on the local media
* the path to use to reach the destination host
the bits that will be transferred over the media
the source application or process creating the data
8
What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?
physical, network, application, data link, presentation, session, transport
application, physical, session, transport, network, data link, presentation
application, presentation, physical, session, data link, transport, network
* application, presentation, session, transport, network, data link, physical
presentation, data link, session, transport, network, physical, application
9
Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)
Network A -- WAN
* Network B -- WAN
* Network C -- LAN
Network B -- MAN
Network C -- WAN
* Network A -- LAN
10
What are the key functions of encapsulation? (Choose three.)
allows modification of the original data before transmission
* identifies pieces of data as part of the same communication
enables consistent network paths for communication
* ensures that data pieces can be directed to the correct receiving end device
* enables the reassembly of complete messages
tracks delay between end devices
11
Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?
piping
PDU
streaming
multiplexing
* encapsulation
12
What is a PDU?
corruption of a frame during transmission
data reassembled at the destination
retransmitted packets due to lost communication
* a layer specific encapsulation
13
Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"
the destination device
* an end device
an intermediate device
a media device
14
Refer to the exhibit. Which set of devices contains only end devices?
A, C, D
B, E, G, H
C, D, G, H, I, J
D, E, F, H, I, J
* E, F, H, I, J
15
Refer to the exhibit. Which term correctly identifies the device type that is included in the green area?
source
end
transfer
* intermediary
16
Which three statements best describe a Local Area Network (LAN)? (Choose three.)
* A LAN is usually in a single geographical area.
* The network is administered by a single organization.
The connection between segments in the LAN is usually through a leased connection.
The security and access control of the network are controlled by a service provider.
* A LAN provides network services and access to applications for users within a common organization.
Each end of the network is generally connected to a Telecommunication Service Provider (TSP).
17
Refer to the exhibit. What type of network is shown?
WAN
MAN
* LAN
WLAN
18
What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
* data representation, encoding, and control
reliability, flow control, and error detection
detailing the components that make up the physical link and how to access it
the division of segments into packets
19
Which characteristic correctly refers to end devices in a network?
manage data flows
originate data flow
* retime and retransmit data signals
determine pathways for data
20
What is the primary purpose of Layer 4 port assignment?
to identify devices on the local media
to identify the hops between source and destination
to identify to the intermediary devices the best path through the network
to identify the source and destination end devices that are communicating
* to identify the processes or services that are communicating within the end devices
21
Select the statements that are correct concerning network protocols. (Choose three.)
* define the structure of layer specific PDU's
dictate how to accomplish layer functions
* outline the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors
Session
2
What is a primary function of the trailer information added by the data link layer encapsulation?
* supports error detection
ensures ordered arrival of data
provides delivery to correct destination
identifies the devices on the local network
assists intermediary devices with processing and path selection
3
During the encapsulation process, what occurs at the data link layer?
No address is added.
The logical address is added.
* The physical address is added.
The process port number is added.
4
What device is considered an intermediary device?
file server
IP phone
laptop
printer
* switch
5
Which layer encapsulates the segment into packets?
physical
* data link
network
transport
6
Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
* determine pathways for data
initiate data communications
* retime and retransmit data signals
originate the flow of data
* manage data flows
final termination point for data flow
7
What can be identified by examining the network layer header?
the destination device on the local media
* the path to use to reach the destination host
the bits that will be transferred over the media
the source application or process creating the data
8
What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?
physical, network, application, data link, presentation, session, transport
application, physical, session, transport, network, data link, presentation
application, presentation, physical, session, data link, transport, network
* application, presentation, session, transport, network, data link, physical
presentation, data link, session, transport, network, physical, application
9
Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)
Network A -- WAN
* Network B -- WAN
* Network C -- LAN
Network B -- MAN
Network C -- WAN
* Network A -- LAN
10
What are the key functions of encapsulation? (Choose three.)
allows modification of the original data before transmission
* identifies pieces of data as part of the same communication
enables consistent network paths for communication
* ensures that data pieces can be directed to the correct receiving end device
* enables the reassembly of complete messages
tracks delay between end devices
11
Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?
piping
PDU
streaming
multiplexing
* encapsulation
12
What is a PDU?
corruption of a frame during transmission
data reassembled at the destination
retransmitted packets due to lost communication
* a layer specific encapsulation
13
Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"
the destination device
* an end device
an intermediate device
a media device
14
Refer to the exhibit. Which set of devices contains only end devices?
A, C, D
B, E, G, H
C, D, G, H, I, J
D, E, F, H, I, J
* E, F, H, I, J
15
Refer to the exhibit. Which term correctly identifies the device type that is included in the green area?
source
end
transfer
* intermediary
16
Which three statements best describe a Local Area Network (LAN)? (Choose three.)
* A LAN is usually in a single geographical area.
* The network is administered by a single organization.
The connection between segments in the LAN is usually through a leased connection.
The security and access control of the network are controlled by a service provider.
* A LAN provides network services and access to applications for users within a common organization.
Each end of the network is generally connected to a Telecommunication Service Provider (TSP).
17
Refer to the exhibit. What type of network is shown?
WAN
MAN
* LAN
WLAN
18
What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
* data representation, encoding, and control
reliability, flow control, and error detection
detailing the components that make up the physical link and how to access it
the division of segments into packets
19
Which characteristic correctly refers to end devices in a network?
manage data flows
originate data flow
* retime and retransmit data signals
determine pathways for data
20
What is the primary purpose of Layer 4 port assignment?
to identify devices on the local media
to identify the hops between source and destination
to identify to the intermediary devices the best path through the network
to identify the source and destination end devices that are communicating
* to identify the processes or services that are communicating within the end devices
21
Select the statements that are correct concerning network protocols. (Choose three.)
* define the structure of layer specific PDU's
dictate how to accomplish layer functions
* outline the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors
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