Question 1

Which WAN technology is designed to work with a variety of commonly used layer-2 protocols and is sometimes called a layer-2.5 technology because it inserts a 4-byte header that contains its own information between the layer-2 frame and the layer-3 IP packet?.

Accepted Answer

A)  Ethernet
B)  TCP
C)  MPLS
D)  IRoute
E)  T1 C

Question 2

__________ is a term that refers to the time delay in converting input packets to output packets.

Accepted Answer

A)  Transfer mode
B)  Latency
C)  Burstiness
D)  Cell relay
E)  Frame relay B

Question 3

A star topology is:

Accepted Answer

A)  difficult to manage because the central computer receives and routes all messages in the network
B)  dependent upon the capacity of the central computer for its performance
C)  always slower than a ring network
D)  less susceptible to traffic problems than other architectures
E)  not affected if the central computer fails B

Question 4

A star architecture:

Accepted Answer

A)  connects all computers in a closed loop
B)  connects all computers off a backbone circuit
C)  connects all computers to one central computer that routes messages to the appropriate computer
D)  all of the above
E)  none of the above

Question 5

Full mesh networks are inexpensive.

Accepted Answer

A) True 
 B)False

Question 6

Compare the ring, star, and mesh architectures.Provide one example of when each one might be better to use compared to the others.

Accepted Answer

The answer of Compare the ring, star, and mesh architectures.Provide...

Question 7

Explain the differences between CIR and MAR.

Accepted Answer

The answer of Explain the differences between CIR and MAR....

Question 8

A WAN with a ring topology can use full or half duplex circuits

Accepted Answer

A) True 
 B)False

Question 9

A T1 circuit provides a data rate of 1.544Mbps.

Accepted Answer

A) True 
 B)False

Question 10

Datagrams are connection-oriented.

Accepted Answer

A) True 
 B)False

Question 11

In North America, a T1 circuit has ______ 64Kbps channels.

Accepted Answer

A)  2
B)  30
C)  24
D)  12
E)  36

Question 12

Today, a common carrier that provides long distance services is typically called a local exchange carrier.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following type of networks permit packets from separate messages to be interleaved?

Accepted Answer

A)  circuit switched network
B)  dedicated circuit network
C)  dial up circuit network
D)  packet switched network
E)  Fractional T-1 network

Question 14

A _____________ is a user's connection into a packet switched service.

Accepted Answer

A)  packet analog/digital device
B)  packet asynchronous/discrete device
C)  packet asymmetric/data transmission device
D)  packet assembly/disassembly device
E)  packet analyzer/decoder device

Question 15

Which of the following is a primary advantage of a VPN in comparison to a private WAN connection?

Accepted Answer

A)  low cost
B)  inflexibility
C)  unpredictable traffic congestion
D)  security
E)  complexity to the user

Question 16

Which of the following is not a key issue to be considered when selecting a WAN service?

Accepted Answer

A)  prestige value of using a particular common carrier
B)  flexibility
C)  capacity
D)  control
E)  reliability

Question 17

With a virtual private network, users create permanent virtual circuits through the Internet called:

Accepted Answer

A)  bursts
B)  cells
C)  tunnels
D)  rings
E)  clouds

Question 18

Frame relay is a reliable packet service.

Accepted Answer

A) True 
 B)False

Question 19

A _______________ is a particular type of network that uses circuits that run over the Internet but that appears to the user to be a private network.

Accepted Answer

A)  local carrier network
B)  virtual private network
C)  integrated service digital network
D)  software defined network
E)  SONET network

Question 20

VPNs offer high security because they operate through the Internet.

Accepted Answer

A) True 
 B)False

Exam 9: Wide Area Networks

Which WAN technology is designed to work with a variety of commonly used layer-2 protocols and is sometimes called a layer-2.5 technology because it inserts a 4-byte header that contains its own information between the layer-2 frame and the layer-3 IP packet?.

__________ is a term that refers to the time delay in converting input packets to output packets.

A star topology is:

A star architecture:

Full mesh networks are inexpensive.

Compare the ring, star, and mesh architectures.Provide one example of when each one might be better to use compared to the others.

Explain the differences between CIR and MAR.

A WAN with a ring topology can use full or half duplex circuits

A T1 circuit provides a data rate of 1.544Mbps.

Datagrams are connection-oriented.

In North America, a T1 circuit has ______ 64Kbps channels.

Today, a common carrier that provides long distance services is typically called a local exchange carrier.

Which of the following type of networks permit packets from separate messages to be interleaved?

A _____________ is a user's connection into a packet switched service.

Which of the following is a primary advantage of a VPN in comparison to a private WAN connection?

Which of the following is not a key issue to be considered when selecting a WAN service?

With a virtual private network, users create permanent virtual circuits through the Internet called:

Frame relay is a reliable packet service.

A _______________ is a particular type of network that uses circuits that run over the Internet but that appears to the user to be a private network.

VPNs offer high security because they operate through the Internet.