Question 1.
Which of the following protocols are in the WAN?

A. X.25
B. Ethernet-II
C. LAPB
D. Frame-Relay
E. ATM
F. PPP

Answer: A, C, D, E, F

Question 2.
When designing the frame relay network, which is the most economic means to backup PVC?

A. Use ATM link to backup
B. Use the dual-PVC project and the sub interface technology.
C. X.25 technology
D. Adopt DCC (Dial Control Center) technology

Answer: D

Question 3.
Which of the following can guarantee the network security?

A. Data encryption
B. Authentication technology
C. Security attribute of the computer
D. Data compression technology

Answer: A, B, C

Question 4.
Which of the following route types is adopted for the Stub domain in OSPF network to be connected with the backbone area?

A. Floating static routing
B. Dynamic routing
C. The default routing automatically generated by the router
D. Static routing

Answer: C

Question 5.
Which of the following items can be used to select the path of the network layer?

A. Routed protocol
B. Routing protocol
C. STP(Spanning tree protocol)
D. Frame relay protocol

Answer: B

Question 6.
Which of the following descriptions of the frame relay network and the X.25 network are true?

A. X.25 network is based on the circuit switching technology, while the frame delay network is based on the packet switching technology.
B. Although X.25 network is of high reliability and costs less, it has a bigger delay and small  bandwidth occupation. It is often replaced by the frame relay network.
C. The DLCI number of the frame relay network is only locally significant.
D. X.25 network commits data transmission rate

Answer: B, C

Question 7.
Which of the following technologies can be adopted by BGP4 to aggregate multiple Class C routes into one route?

A. EBGP
B. VLSM
C. IBGP
D. CIDR

Answer: D

Question 8.
PRI refers to.

A. 23B+D (European standard)
B. 30B+D (North American standard)
C. 23B+D (North American standard)
D. 30B+D (European standard)

Answer: C, D

Question 9.
Which of the following addresses stands for all the routers and hosts participating in the multicast in the subnet?

A. 224.0.0.1
B. 224.0.0.2
C. 224.0.0.3
D. 224.0.0.9

Answer: A

Question 10.
For a switching network composed of the equipments of multiple manufacturers including Huawei, the tag of the VLAN should be defined by.

A. IEEE 802.1Q
B. ISL
C. VLT
D. All the above items are OK.

Answer: A

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