FILL BLANKBGP routes have multiple path attributes. When a router advertises a BGP route to its peers, the route carries multiple path attributes. These attributes describe the characteristics of the BGP route and affect route selection in some scenarios. The ___________ attribute is Huawei-specific. It is valid only on the local device and is not transmitted to BGP peers. (Enter the attribute name in lowercase as it appears in the command output about the BGP routing table.)
Answer(s): A
The prefval attribute is Huawei-specific, used to influence BGP route selection. It is valid only on the local device and is not transmitted to BGP peers.
When a BGP device sends an Open message to establish a peer connection, which of the following information is carried? (Choose all that apply.)
Answer(s): A,C,D
Local AS number: The Open message carries the AS number of the local device to establish the BGP session and identify the Autonomous System.Router ID: The Router ID is included in the Open message to identify the BGP router uniquely within the AS.Hold time: The Hold time is included in the Open message, specifying the maximum time that can pass without receiving a Keepalive message from the peer before the connection is considered down.
FILL BLANKDuring BGP route summarization configuration, the ________ keyword can be used to suppress all specific routes so that only the summary route is advertised. The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes. (Enter the full name in lowercase.)
The atomic-aggregate keyword is used during BGP route summarization to suppress all specific routes and advertise only the summary route. This summary route carries the Atomic-Aggregate attribute instead of the community attributes of specific routes.
When a router running BGP is in the Connect state, BGP starts the ConnectRetry timer and waits for a TCP connection to be established. If BGP does not receive any response from a BGP peer throughout the ConnectRetry timer, BGP attempts to establish TCP connections with other BGP peers and remains in the Connect state.
Answer(s): B
When BGP is in the Connect state and the ConnectRetry timer expires without receiving a response, BGP does not attempt to establish TCP connections with other peers. Instead, it will continue to attempt the connection with the current peer. The router will stay in the Connect state until the connection is successfully established or until it retries after the timer expires again.
FILL BLANKWhen receiving a packet, a Huawei router matches the packet against ACL rules. The default ACL matching order used by the Huawei router is ________. (Enter lowercase letters.)
The default ACL matching order on a Huawei router is top to bottom. The router processes ACL rules sequentially from the top of the list, matching the first rule that applies to the packet. If no match is found, the router proceeds to the next rule in the list.
Bidirectional route re-advertisement enables a border router to import routes between two routing domains. However, this may cause sub-optimal routes and routing loops.
Bidirectional route re-advertisement allows a border router to import routes between two routing domains, but it can result in sub-optimal routes and potential routing loops due to the exchange of routing information between different domains without proper filtering or adjustments.
The IP prefix list configuration on a Huawei router is shown below. Which of the following routes can match the IP prefix list and be permitted? (Choose all that apply.)ip ip-prefix huawei index 10 deny 10.1.1.0 24ip ip-prefix huawei index 20 permit 10.1.1.1 32ip ip-prefix huawei index 30 permit 10.1.2.0 24 less-equal 32
Answer(s): B,C,D
10.1.1.2/32: This route matches the second rule (permit 10.1.1.1 32) because it permits the specific address 10.1.1.1/32, and the address 10.1.1.2/32 is allowed under the conditions of the IP prefix list (a more specific match can still pass the condition).10.1.2.5/32: This route matches the third rule (permit 10.1.2.0 24 less-equal 32), as it is a valid IP in the 10.1.2.0/24 network, satisfying the less-equal 32 condition.10.1.2.0/25: This route also matches the third rule (permit 10.1.2.0 24 less-equal 32), as the /25 subnet is valid within the 10.1.2.0/24 range.
A router uses an advanced ACL to filter data. The ACL configuration is shown below. Which of the following statements is false about the configuration?[Huawei] ad 3001[Huawei-ad-adv-3001] rule permit icmp source 192.168.1.3 0 destination 192.168.2.0 0.0.0.255
Answer(s): D
The ACL permits ICMP packets from host 192.168.1.3 to host 192.168.2.200 is false. The ACL rule permits ICMP packets from the source IP 192.168.1.3 to the destination network 192.168.2.0/24. It does not specifically target host 192.168.2.200 but rather allows any packet destined to the entire network range 192.168.2.0/24, which includes 192.168.2.200.
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