During the LDPsession setup process, the active party first sends the Illitalization information to negotiate the parameters, and if the passive party does not accept the negotiation parameters, which of the following messages will be sent? <(Single select).)
A. Hello Message
B. Error Notification Message
C. Keepalive Message
D. Initialization Message
Regarding Route Policy, is the following description correct?
A. Advanced ACLs can be applied in route-policy to filter routes
B. The table entries pernit::0 Less an equal 128 indicate that all IPV6 routes are allowed through
C. If more than one node is defined in Route one policy, there should be at least one node in each node that matches permit
D. Route one policy filters only the default route
The following statement about EVPN Type5 routing is wrong?( Single choice questions).
A. Type5 routes carry Layer 3 VNI.
B. Type5 routing carries both Layer 2 VWI and Layer 3 VNI
C. The IP Prefix field can carry both host and network segment addresses.
D. Type5 is an IP prefix route.
The correct description of the extended features of ISIS is ?
A. When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.
B. ISIS can choose whether to authenticate incoming SNP and LSP packets
C. If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.
D. After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.
In MPLSVPN, in order to distinguish between IPv4 prefixes that use the same address space, the RD value is added to the IPv4 address, and the following options are described correctly as ?
A. RD can be used to control the publication of VPN routing information
B. On a PE device, each VPN instance corresponds to an RD value, and the RD value must be unique on the same PE device
C. RD is encapsulated in the Update message as an extended community attribute of BGP during delivery
D. After the PE receives an IPv4 route from CE, it adds an RD to the route to IPv4 that translates to a globally unique VPN-IPv4 route and publishes it on the public network
What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)
A. Added maximum response time field
B. Added high group messages
C. Added specific group query message
D. Added a specific source group query packet
RTA is the source DR router, RTB is the RP router, and the multicast source sends multicast data to the RTA, but the PIM is not visible on the RTB Register the multicast source to which the message is registered, then the possible causes are ?
A. Multicast network statically configures RP, while RTA router does not statically configure RP
B. The RP elected by RTA is not an RTB
C. RTB to RTA has no unicast routing, causing the RTB to fail RPF checks for the source
D. The multicast network dynamically elects the RP instead RTA failed RPF check for BSR
The following description of the characteristics of cross-domain VN-Optionc is correct?
A. A maximum of two layers of tags need to be used in the message forwarding process.
B. VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.
C. VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN route.
D. Cross-domain VN-Optionc, which is not suitable for use when spanning multiple AS.
ipv6 link-local addresses can be generated through stateless autoconfiguration
A. TRUE B. FALSE
Regarding the MPLS basic forwarding process, the following description is incorrect? Radio
A. By default, the PHP-enabled Erass node assigns a label value of 3 to the inverted second-hop node.
B. When an IP message enters the MPLS domain, the MPLS boundary device inserts a new label between the layer 2 header and the IP header.
C. When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.
D. The transport node device replaces the existing top-of-stack label (outermost label) with the label assigned by the next hop device.
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