1. The use of class-based QoS is essentially a policy approach, which is implemented by first classifying traffic, then specifying some specified QoS action sets, and then combining the specified categories and specified actions into a policy, finally apply the policy to the implementation.

2. Which of the following statements is correct? (multiple choice)

3. During the process of LDP session establishment, what is the address used to establish a TCP connection?

4. Configure five queues in CQ, each queue number of bytes respectively are 4000, 4000, 8000, 8000, 16000, if five queues have sufficient packets to be sent, then the allocated bandwidth for each queue ratio:

5. To VPN routing forwarding table, what are the correct statements about the public network routing forwarding table? (multiple choice)

6. Suppose a router has four physical interfaces, and the MTUs are 500, 800, 1200 and 1500. If you want to configure traffic shaping, there are several different options for the burst size of the token bucket. Which of these settings are desirable? (multiple choice)

7. Which of the following statements about the conservative label retention of the LSR is wrong?

8. In MPLS TE, the management group is configured in the physical interface view.

9. In MPLS TE, the establishment priority of the same tunnel cannot be higher than (prior to) the holding priority.

10. Under the AR1 device port, configured the ISIS neighbor time out as 3x4=12 seconds
<ar1>dis cu int g7/0/4
interface GigabitEthernet7/0/4
isis timer hello 3 level-1
isis timer holding-multiplier 4 level-1
Under the AR2 device port, configured the ISIS neighbor time out as 3x4=12 seconds
<ar2>dis cu int g7/0/4
interface GigabitEthernet7/0/4
isis timer hello 3 level-1
isis timer holding-multiplier 4 level-1
But the ISIS neighbor time out of AR1 is 300 seconds
<ar1>dis isis peer
Peer information for ISIS（64）
----------------------------------
System Id Interface Circuit Id State HoldTime Type PRI
ar2 GE7/0/4 bjbj-ch-a-1.01 Up 300s L1 50
Also the ISIS neighbor time out of AR2 is 300 seconds
<ar2>dis isis peer
Peer information for ISIS（64）
------------------------------------
System Id Interface Circuit Id State HoldTime Type PRI
Ar1 GE7/0/4 bjbj-ch-a-1.01 Up 300s L1 50
Both AR1 and AR2 are configured the ISIS GR, what is the cuase of the error that the ISIS set timeout is inconsistent with the actual ISIS neighbor timeout?

11. Which of the following are incorrect about IPv6 anycast address? (multiple choice)

12. Traffic classification based on class-based QoS is used to distinguish traffic through ACLs. Therefore, ACLs cannot be matched and cannot be used as a basis for differentiation.

13. In the VRP, which technology can be used for congestion avoidance? (Multiple Choice)

14. You can use the mpls to igp metric command to change the IGP metric of a TE tunnel in the tunnel interface view. Both ISIS and OSPF support absolute and relative.

15. In the process of IPv6 address allocation if tentative address DAD detection fails, you can take what way to configure IPv6 address? (Select 2 answers)

16. MPLS has two methods for processing TTL. One of them is to calculate the MPLS TTL into the IP TTL. If a TTL which as 10 IP packet combines MPLS domain through three routers, what is its TTL minus?

17. By default, in the VRP5, Egress points assigned ( ) to the penultimate hop.

18. RTA using Ethernet0/0 interface to connect to a LAN. Port IP address is 10.1.1.251, network mask is 255.255.255.0.
Require to create a virtual router on RTA, ID is 1, the virtual IP address is 10.1.1.254, which of the following command is correct?

19. The establishment and teardown of a BFD session are the same as the TCP establishment process. They are three-way handshake and disconnected four times, so the reliability is high.

20. In MPLS TE, affinity attributes and masks are configured on the tunnel interface.