Question 31
As shown in the figure, RTA, RTB, and RTC use the OSPF protocol. The default cost value is used for links, and unicast routes converge on the entire network. The Loopback 0 interface is set to configure RTC as the RP or BSR. The SPT switching threshold uses the default value on RTB. The receiver joins the multicast group 225.1.1.1. The multicast source sends multicast data to the destination address 225.1.1.1. Which interface is the inbound interface in the (10.1.1.1, 225.1.1.1) entry on RTB?
Question 32
Which statement describes the delay variation requirement of the voice service for the IP bearer network?
Question 33
OSPF BFD helps fast detect neighbor down events. OSPF BFD can be in which of the following states?
Question 34
Refer to the exhibit.
Which statement about Hub & Spoke MPLS VPN is false?
A . If two Spoke sites are connected to the same Spoke PE, they must be assigned to different VPN instances to prevent them from exchanging routing information.
B . The route of traffic from Spoke site 1 to Hub site 2: Traffic enters Hub site 3 through an interface under VPN1-Hub of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Spoke of the Hub PE.
C . The route of traffic from Spoke site 2 to Hub site 1: Traffic enters Hub site 3 through an interface under VPN1-Spoke of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Hub of the Hub PE.
D . The Hub PE can advertise aggregate Spoke site routes or default routes to Spoke PEs through VPNv4.
E .Routes advertised by a Spoke PE to Spoke site 1 of the Hub PE may be advertised back by the Hub PE through a VPNv4 neighbor.
Configure VRFs and relevant policies on a PE as follows:
#
ip vpn-instance vrf1
route-distinguisher 100:1
export route-policy vrf1
vpn-target 1:1 export-extcommunity
vpn-target 2:2 import-extcommunity
ip vpn-instance vrf2
route-distinguisher 100:2
import route-policy vrf2
vpn-target 1:1 3:3 export-extcommunity
vpn-target 1:1 3:3 import-extcommunity
ip vpn-instance vrf3
route-distinguisher 100:3
import route-policy vrf3
vpn-target 2:2 3:3 export-extcommunityvpn-target 2:2 3:3 import-extcommunity ip vpn-instance vrf4 route-distinguisher 100:4 import route-policy vrf4 vpn-target 1:1 export-extcommunity vpn-target 2:2 import-extcommunity
#
route-policy vrf2 deny node 1
if-match extcommunity-filter 1
#
route-policy vrf2 permit node 2
#
route-policy vrf1 permit node 1
apply extcommunity rt 3:3 additive
#
route-policy vrf3 permit node 1
if-match extcommunity-filter 2
#
route-policy vrf4 permit node 1
if-match extcommunity-filter 3
#
ip extcommunity-filter 1 permit rt 2:2
ip extcommunity-filter 2 deny rt 1:1
ip extcommunity-filter 3 permit rt 3:3
#
If a route is imported to the routing table of VRF 1, which VRF can the route match?(A)
Question 35
Which of the following statements about the working principle f LDAP FRR are true?