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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. IPSec polic is configured between the two routers , after the policy is issued to the corresponding interface, the ping command is used to check the interoperability of the protected data flow, and it is found that the data passes 100% .Use displa ike sa and displa ipsec sa to order, it shows that IPSec SA is not established.
The reason for the failure of IPSec configuration is ____ .( Choose one or more )

A) The transmission mode is used in the IPSec proposal , and the protected data flow is data from network segment to network segment
B) ACL configuration is incorrect
C) The remote-add ress address of IKE is not the interface address of the peer router
D) the IKE the pre-shared-ke configuration mismatch

2. Traffic shaping usually uses ______ to make the traffic output to the downstream network meet a certain restriction standard, and to reduce the fluctuation of the output traffic and make it smoother.

A) cache buffer zone
B) make token bucket
C) teams column adjustment
D) Message compression

3. In the SIP network, when the redirect server receives the session request message sent by the calling UA , ____ .

A) Heavy targeting server to find the called UA position information, which is returned to the calling UA
B) Heavy directional wiping search server called UA position information, the position and initiates a session request
C) re- orienting the received server directly calling UA session request ; forwards the message to the called UA
D) Lord called UA all messages are forwarded through a proxy server

4. Regarding the echo in the VoIP telephone system, which of the following descriptions are wrong ?

A) back sound into electrical echo and acoustic echo, a conventional telephone system is mainly due to two electrical echo, four-wire conversion impedance mismatch caused by
B) In a VoIP network, the echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.
C) speech voice gateway when performing analog to digital conversion may introduce echo, but can be configured to suppress echo in voice gateway function to reduce this effect
D) language voice gateway equipment itself does not bring new echo, but the lP network brings network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network Felt echo

5. IP OVER IP of GRE encapsulation, the IP protocol number used ________ marking GRE header

Solutions: