Huawei H12-261-ENU 問題集

質問 1：
The following statement about cross-domain MPLS VPN, which is the wrong description?
A. For the cross-domain vPn-OptionA mode, the route between the two ASBR is a common IPv4 route.
B. For the cross-domain vPN-OptionB mode, an MP-eBGP neighbor relationship needs to be established between the two ASBR.
C. For the cross-domain vPN-OptionB mode, two ASBR are interconnected by multiple interfaces (including sub-interfaces). Each interface is associated with one VPN. Each ASBR-PE uses the peer as the CE.
D. When the public network label is only LDP, the cross-domain vp-Option-c scheme 2 needs to use three-layer labels in the packet forwarding process.
正解：C,D

質問 2：
The LAND attack is performed by the attacker sending a source address and a destination address to the destination host, they are all the destination hosts. The source port and the destination port are the same SYN packet. When the receiver waits for the final ACK packet from the sender, The connection is always in a semi-connected state, resulting in waste of limited TCP resources at the receiving end.
A. False
B. True
正解：A

質問 3：
In broadcast network, the election of DIS is started after the neighbor relationship is established.
A. False
B. True
正解：B

質問 4：
IPSG can configure static binding table or use DHCP-snooping to form a binding table.
A. False
B. True
正解：B

質問 5：
Regarding the Stub area and the NSSA area of the OSPF protocol, which of the following statement is incorrect?
A. Type7 LSA is not allowed in the Stub area, and Type 7 LSA is allowed in the NSSA area.
B. Type 5 LSA is not allowed in the Stub area, and Type 5 LSA is allowed in the NSSA area.
C. Both the Stub area and the NSSA area can inject Type 3 LSAs.
D. Both the Stub area and the NSSA area are not allowed to inject Type 4 LSA.
正解：B

質問 6：
Which of the following statement about IPSec VPN is true? (Multiple choice)
A. two routers establish IPSec VPN through aggressive mode, then a minimum of interaction 4 packets between the two devices build tunnel
B. Two routers establish an IPSec VPN through the master mode. Starting from the fifth packet (inclusive), the payload data is often encrypted.
C. Savage mode can support NAT traversal, while main mode does not support NAT traversal
D. Between two routers, an OSPF neighbor relationship can be established through an IPSec VPN tunnel, and intranet routes can be exchanged.
正解：A,B

質問 7：
Which type of prefix will the router running BGP advertise to its own IBGP neighbor (assuming the router is not configured as a route reflector)?
A. The prefix is learned through other IBGP neighbors, or the prefix is learned from the EBGP neighbor, or the prefix is learned through the route introduction.
B. The prefix is learned through other BGF neighbors, or the prefix is locally learned through network or route introduction.
C. The prefix is learned through the EBGP neighbor, or the prefix is learned locally through the network or route introduction.
D. Prefix existing in routing shows
E. The prefix is learned through the EBGP neighbor, or the prefix is learned from the RR.
正解：C

質問 8：
A company has built an OSPF network as shown in the following figure. The links form an OSPF neighbor relationship. All devices have announced their own loopback address. On one day, the S1-R2 and S2-R1 links are faulty. Which of the following description is correct? (Area 0 is split)

A. R1 can learn the loopback route of R2 normally.
B. R3 cannot learn the loopback route of R2.
C. R5 can learn the loopback route of R2 normally.
D. R3 can learn the loopback route of R2 normally.
正解：B,C

質問 9：
Which of the following is the correct description of the route priority for ISIS?
A. The routing priority of ISIS cannot be modified.
B. The default route of ISIS priority is 15.
C. ISIS aggregated route has a priority of 10
D. The LeveI-1 and Leve-2 routes in the ISIS database have different routing priorities.
正解：B