If a DR needs to be elected between multicast routers running PIM-SM to be responsible for the sending and receiving of source or member multicast data, which one is described correctly below for the DR election rule?

A. PIM routers with long interface masks are elected dr.

B. Compare the DR priority first; With the same priority, you need to compare the interface IP addresses of the PIM routers to elect dr

C. PIM routers with small IP addresses are elected DR. PIM routers with low D. DR priority values are elected DR.

Regarding route Policy, the following description is correct as ?( Multiple selection) Multiple selection

A. Advanced ACLs can be applied in route-policy to filter routes

B. The table entry exceed::0 less-equal 128 indicates that all IPv6 routes are allowed through

C. If more than one node is defined in Route-policy, at least one node in each node should have a matching pattern of permit

D. Route-Policy can filter only the default route

IPSGs can statically configure binding tables or form binding tables by using them with DHCP-Snooping

A. True

B. False

The network administrator defines a traffic policing policy as follows:

A. 256K bytes

B. 48128 bytes

C. 32K bytes

D. 80128 bytes

When the ACL in the VRP has multiple matching rules (rules), the matching order is about Which of the following statements is true?( Confirmed).

A. By default, matching is based on the principle of "depth first"

B. By default: Match in the order in which the perfect is matched first, then deny is matched.

C. By default, rule-ID is followed Match from small to large

D. There is only one matching order and cannot be modified

The following about the Router-LSA of OSPFv3 is correct?( Single choice questions).

A. The router-LSA data area contains the Link-Local address

B. The router-LSA data area contains the Interface ID of the neighbor on this side

C. Similar to OSPFv2, the Option field exists in the header of LSA, not in the data area of Router-LSA

D. When LS type= Ox0001 in the head of LSA, the data area representing LSA is Router- LSA

The following statement about the application of BFD is correct?

A. The one-arm echo function refers to the detection of the connectivity of the forwarding link through the loopback operation of the BFD packet

B. BFD multi-hop detection means that BFD can detect arbitrary paths between two systems that may span many hops or overlap in some parts

C. BFD and OSPF linkage is to associate BFD and OSPF, and notify OSPF through BFD's rapid sensing of link failures, thereby speeding up OSPF Response to changes in network topology

D. BFD single-hop detection refers to the IP connectivity detection of two direct-connected systems

0SPFV2 is running on the IPV4 network IGP: OSPF3 is running in the IPV6 network, OSPF35 OSPFV2 has the same message type. Includes hello messages, DOD messages, LSR messages, LAU messages, and SAX messages about OSPP The following statement is correct?

A. The hello packet of OSPFv3 carries the IPV6 address prefix of the router interface

B. OSPFv3 uses the authentication field of the packet header to complete the packet authentication

C. OSPFv3 uses the link-local address as the source address for sending packets, which can be forwarded outside the range of the originating link

D. OSPFv3 sends OSPFv3 packet using the IPV6 multicast addresses FF02::5 and FF02

The message types of ISIS mainly include SNP, IIH, and LSP

A. True

B. False

A medium-sized campus network manages the network through the SNMP protocol, and the campus is highly network-safe, so which version of SNMP is recommended for management?

A. SNMPv1 B. SNMPv2C

B. SNMPV3

C. All versions are available to implement