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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. In the H.323 call flow, if two terminals registered to the same gatekeeper adopt the direct call mode, then

A) H.245 capability negotiation is completed directly between two terminals
B) to the answers are right
C) Messages such as Setup and Connect are directly exchanged between the two terminals
D) Messages such as ARQ and ACF are directly exchanged between the two terminals

2. Among the following tunneling technologies that do not have the function of data encryption are ______ .

A) GRE
B) MPLS-VPN
C) L2TP
D) IPSec tunnel

3. In the private network routing table of the PE equipment, the next hop of the remote user's private network route is ______ .

A) present P E of loopbac K interface address
B) distal end of the PE and CE interface address connected
C) distal end CE of the loopback interface address
D) distal end PE of the loopback interface address

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

A) speech voice gateway device when performing analog to digital conversion may introduce echo, an echo suppression function but can be configured to reduce the impact on the voice gateway.
B) language voice gateway equipment itself does not bring new echo, but the IP network to bring network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network The echo of being felt.
C) In VoIP networks, echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.
D) back sound into electrical echo and acoustic echo, electrical echo conventional telephone systems is mainly due to two, four-wire transducer impedance mismatch caused by

5. The three routers are shown in the figure .A GRE tunnel is created between Routerl and RouLer3 .The configuration commands for the three routers are :
Routerl:
[Router1]interface Serial 0/2/0
[Router1-Serial0/2/0]ip address 10.1.1.1 24
ERouter1]interface loopback 0
[Router1-LoopBack0]ip addre ss 1.1.1.1 32
[Router1]interface Tunnel 0
[Router1-Tunnel0]source 10.1.1.1
[Router1-Tunnel0]destination 20.1.1.2
[Routerl-Tunnel0]ip address 100.1.1.1 24
[Router1]ospf
IRouter1-ospf-1]area 0
IRouter1-ospf-1-area-0.0.0.0]network 10.1.1.1 0.0.0.255
[Router1]ip route-static 3.3.3.3 32 100.1.1.2
Router2:
[Router2]interface Serial 0/2/0
[Router2-Serial0/2/0]ip address 10.1.1.2 24
[Router2]interface Serial 0/2/1
[Router2-Serial0/2/0]ip address 20.1.1.1 24
[Router2]ospf
IRouter1-ospf-1]area 0
IRouter1-ospf-1-area-0.0.0.0]network 10.1.1.2 0.0.0.255
IRouter1-ospf-1-area-0.0.0.0]network 20.1.1.1 0.0.0.255
Router3:
[Router3]interface Serial 0/2/0
[Router3-Serial0/2/0]ip address 20.1.1.2 24
[Router3]interface loopback 0
[Router3-LoopBack0]ip address 3.3.3.3 32
[Router3]interface Tunnel 0
[Router3-Tunnel0]source 20.1.1.2
[Router3-Tunnel0]destination 1 0.1.1.1
[Router3-Tunnel0]ip address 100.1.1.2
[Router3]ospf
[Router3-ospf-l]area 0
[Router3-ospf-l-area-0.0.0.0] network 20.1.1.2 0.0.0.255
[Router3]ip route-static l.1.1.1 32 100.1.1.1
Use the command ping-a 1.1.1.1 3.3.3.3 on Router 1 to check the connectivity, and 100% receive ICMP reply packets.
In the above process, the following description of the various routers to process packets of data, is correct ____ .( Choose one or more )

A) Router3 performs GRE encapsulation of ICMP Echo Reply packets
B) Router2 performs lP packet forwarding
C) Router2 performs GRE decapsulation of ICMP Echo Request packets
D) Router 1 performs GRE encapsulation of ICMP Echo Request packets

Solutions: