Networking - Wide Area Networks

Exercise : Wide Area Networks - Wide Area Networks
  • Wide Area Networks - Wide Area Networks
6.
Which encapsulations can be configured on a serial interface?
  1. Ethernet
  2. Token Ring
  3. HDLC
  4. Frame Relay
  5. PPP
1 and 4
2 only
3, 4 and 5
All of the above
Answer: Option
Explanation:
Ethernet and Token Ring are LAN technologies and cannot be configured on a serial interface. PPP, HDLC, and Frame Relay are layer 2 WAN technologies that are typically configured on a serial interface.

7.
Suppose that you have a customer who has a central HQ and six branch offices. They anticipate adding six more branches in the near future. They wish to implement a WAN technology that will allow the branches to economically connect to HQ and you have no free ports on the HQ router. Which of the following would you recommend?
PPP
HDLC
Frame Relay
ISDN
Answer: Option
Explanation:
The key is "there are no free ports" on your router. Only Frame Relay can provide a connection to multiple locations with one interface, and in an economical manner no less.

8.
Which of the following command options are displayed when you use the Router# show frame-relay ? command?
  1. dlci
  2. neighbors
  3. lmi
  4. pvc
  5. map
1 only
2 and 4
3, 4 and 5
All of the above
Answer: Option
Explanation:
The show frame-relay ? command provides many options, but the options available in this question are lmi, pvc, and map.

9.
In which of the following technologies is the term HFC used?
DSL
PPPoE
Frame Relay
Dedicated T1
Answer: Option
Explanation:
In a modern network, hybrid fibre-coaxial (HFC) is a telecommunications industry term for a network that incorporates both optical fiber and coaxial cable to create a broadband network.

10.
A default Frame Relay WAN is classified as what type of physical network?
Point-to-point
Broadcast multi-access
Non-broadcast multi-access
Non-broadcast multipoint
Answer: Option
Explanation:
Frame Relay, by default, is a non-broadcast multi-access (NBMA) network, which means that broadcasts, such as RIP updates, will not be forwarded across the link by default.