Huawei HCIE-Routing&Switching (Written)(Huawei Certified ICT Expert-Routing & Switching) 認定 H12-261-ENU 試験問題:

1. Regarding the BGP alliance, which is wrong description?

A) The Alliance divides an AS into several sub-AS alliances. External As still considers the Alliance to be an AS.
B) The sub-AS number of the confederation is advertised to BGP peers outside the confederation by default.
C) The federation can easily detect the routing loop within the AS because EBGP is running between the sub-AS.
D) The sub-autonomous system within the federation can use a private AS number. A Huawei NE/AR router can be configured with up to 32 sub-AS in a single alliance.

2. Which of the following is true about Smart-link? (Multiple Choice)

A) Smart-link mainly includes two roles: primary port and slave port.
B) Smart-link can be mixed with STP under the interface.
C) Smart-link supports load sharing.
D) Smart-link cannot detect the uplink and downlink status.

3. The LAND attack is performed by the attacker sending a source address and a destination address to the destination host are the destination host, the same SYN packet on source port and the destination port. 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) True
B) False

4. The following are the statements about LDP reliability, which one is wrong?

A) LDP GR Graceful Restart uses the feature that the MPLS forwarding plane is separated from the control plane. The device does not interrupt when the protocol is restarted or the active/standby switchover is performed.
B) The manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup LSP.
C) LDP FRR can also be used to generate an LSP for the label mapping from the non-optimal next hop. And it can be as a backup of the primary LSP to establish the transfer entries.
D) The association between the LDP and the IGP requires the IGP to suppress the advertisement of the route and ensure that the LDP path is consistent with the IGP path.

5. As shown in the configuration, if the administrator configures OSPF on R1 but R1 cannot learn the routes of other routers, the possible reason is (). (Multiple choice)
[R1]ospf [Rl-ospf-1]area 2 [R1-ospf-1-area-0.0.0.2]network 10.0.13.1 0.0.0.0

A) This router is not configured with an OSPF process ID.
B) The router's announcement network address does not match the interface mask.
C) This router is not configured with authentication, but the neighbor router is configured with authentication.
D) Area ID configured by the router and area ID of its neighboring router is different.

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