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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. A PBX of a company in Beijing was originally connected to the operator's telephone network through an analog line.In order to expand the capacity, it was proposed to apply for a digital line from the operator . ______ is the most economical choice.

A) T1
B) E1
C) ATM
D) E&M

2. The main functions of LNS and LAC in L2TP components are ____ .( Choose one or more )

A) LNS and LAC jointly maintain L2TP tunnels
B) LNS will L2TP encapsulate the message received from the remote system ( Remote system ) and send it to LAC
C) LAC can exist on a remote system
D) LNS can exist on the remote system

3. In a VoIP network, which of the following factors are related to the bandwidth saved by VAD technology ?

A) mesh network congestion degree
B) selected encoding type used
C) said language and characteristics of the speaker
D) selected by signaling type

4. AAA supports ______ authentication methods.

A) HWTACACS authorization
B) This authenticated
C) RADIUS authorization
D) Direct access certification

5. The four routers R1 , R2 , R3, and R4 are connected in sequence, and Loopback0 interfaces are created on R1 and R4 , and the interface addresses are 1.1.1.1 and 4.4.4.4 respectively.The four devices are configured with dynamic routing protocols to ensure Loopback0 of R1 and R4 .The address is reachable, and a GRE Tunnel is established between R1 and R4 .Check the tunnel interface information on R1 as follows:
[R1]displa interface Tunnel 0
Tunnelo current state: UP
Line protocol cu rrent state: UP
Description: Tunnelo Interface
The Maximum Transmit Unit is 1476
Internet Address is 10.0.0.1/30 Primar
Encapsulation is TUNNEL , aggregation ID not set
Tunnel source l.1.1.1 , destination 4.4.4.4
Tunnel keepalive disable
Tunnel protocol/transp ort GRE/IP
GRE ke disabled
Checksumming of GRE packets disabled
Last 300 seconds input: 2 btes/sec , 0 packets/sec
Last 300 seconds output: 2 btes/sec , 0 packets/sec
15 packets input , 840 btes
0 input error
27 packets output , 1248 btes
0 0utput error
At this time, if the link between R2 and R3 is interrupted , the following statement is correct.

A) Rl on Tunnel interface remains UP state
B) The IP address of the Tunnel interface of R4 should be 10.0.0.2.
C) The status of the Tunnel interface on R1 is Down
D) The source IP of the Tunnel interface of R4 is 1.1.1.1 , and the destination IP is 4.4.4.4

Solutions: