H31-161 試験問題を無料オンラインアクセス

<Quidway>display igmp group
IGMP interface group report information of VPN-Instance: public net
Ethernet6/1/1(40.1.1.1):
Total 1 IGMP Group reported
Group: 232.0.0.1
Uptime: 00:00:22
Expires: off
Last reporter: 40.1.1.3
Last-member-query-counter: 0
Last-member-query-timer-expiry: off
Group mode: include
Source list:
Source: 20.1.1.56
Uptime: 00:00:22
Expires: 00:05:08
Last-member-query-counter: 3
Last-member-query-timer-expiry: 00:00:01
Source: 20.1.1.57
Uptime: 00:00:22
Expires: 00:00:17
Last-member-query-counter: 3
Last-member-query-timer-expiry: 00:00:01
The preceding information shows the entry states in the IGMP interface table on Ethernet 6/1/1.
Which statement is true when IGMP sends source/group query messages?

• A.IGMP sends two messages. In one message, the multicast source is 20.1.1.56 and the S flag is set to 1. In the other message, the multicast source is 20.1.1.57 and the S flag is not configured.
• B.IGMP sends two messages. In one message, the multicast source is 20.1.1.56 and the S flag is not configured. In the other message, the multicast source is 20.1.1.57 and the S flag is set to 1
• C.IGMP sends one message in which the multicast sources are 20.1.1.56 and 20.1.1.57 and the S flag is not configured.
• D.IGMP sends one message in which the multicast sources are 20.1.1.56 and 20.1.1.57 and the S flag is set to 1.

acl number 2000
rule 15 permit source 225.0.0.0 0.0.0.255
#
interface Ethernet6/1/1
ip address 40.1.1.4 255.255.255.0
igmp version 3
igmp group-policy 2000
igmp enable
pim sm
#
The preceding are partial router configurations. Which of the following behaviors does Ethernet
6/1/1 perform after receiving Internet Group Management Protocol Version 2 (IGMPv2) Report messages for multicast groups 225.0.0.1 and 225.0.1.1?

• A.Do not create a record for group 225.0.0.1.
• B.Create a record for group 225.0.0.1.
• C.Do not create a record for group 225.0.1.1.
• D.Create a record for group 225.0.1.1.

BGP often uses AS PATH to control inter-area routes. Which of the following regular expressions helps ensure that routes within AS 100 and neighboring ASs are received from only one EBGP neighbor?

• A.^100_([0-9]*)
• B.^100_([0-9]+)$
• C.^100_([0-9]*)$
• D.100_([0-9]+)$

Which of the following statements about the fault notification in VLL FRR are true?

• A.The primary PW is carried over an LDP LSP tunnel on the public network side and BFD for LDPLSP (detection interval: 30 ms) is enabled on the LDP LSP tunnel. If a forwarding fault occurs on the public network side of an LSP tunnel, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.
• B.A forwarding fault occurs on the public network side of the primary PW. If BFD for PW is not enabled on the primary PW, the L2VPN cannot perceive the fault on the PSN side and therefore PW switching is not triggered.
• C.The primary PW is carried over a GRE tunnel on the public network side and BFD for PW (detection interval: 30 ms) is enabled on the GRE tunnel. If a forwarding fault occurs on the PSN side of the primary PW, BFD cannot detect the fault because the PW is carried over a GRE tunnel. In this case, the L2VPN needs to detect the fault itself and triggers PW switching.
• D.A forwarding fault occurs on the public network side of the primary PW. If BFD for PW (detection interval: 300 ms) is enabled on the primary PW, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.

Which of the following statements about the VPLS packet forwarding are true?

• A.If a receive broadcast packet sent a remote PE, it forwards the packet only to the AC interface instead of other PEs.
• B.If the destination MAC address of a packets is not a broadcast address and a PE has not learned the MAC address, the PE broadcast this packet in on VSI.
• C.If a PE receives broadcast packets from a local user, the PE forwards the packets to all other interfaces In the same VSI and all other PEs.
• D.If the destination MAC address of a packet is not a broadcast address and a PE has not learned the MAC address, the broadcast this packet in one VSI