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NEW QUESTION # 17
The following figure shows a campus network. IS-IS is configured on all routers, and the network runs normally.
By default, which of the following routers have specific routes on the entire network?
Answer: B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
In IS-IS, routes are distributed differently based on router levels:
Level-1 (L1) routers # Maintain specific routes only within their own area.
Level-2 (L2) routers # Maintain specific routes for the entire network (inter-area routing).
Level-1-2 (L1/L2) routers # Store both L1 and L2 routes and act as area border routers.
In the diagram, R2 and R3 are L1/L2 routers, meaning they store specific routes for both their area and other areas.
R1 is only an L1 router, meaning it only has intra-area routes, and R7 is an L2-only router, meaning it does not store all specific routes.
Therefore, R2 and R3 have specific routes for the entire network.
# Reference: Huawei HCIA-Datacom Study Guide, IS-IS Routing Levels and Route Distribution.
NEW QUESTION # 18
As shown in the figure below, the firewall receives a message from PC1 to PC2, which of the following statements is correct?
Answer: C
NEW QUESTION # 19
Which of the following community attributes enables a device to send a received route with this attribute toany BGP peer?
Answer: B
Explanation:
Internet- Thiscommunity attribute allows a route to be advertised to any BGP peer, including EBGP and IBGP. This is the default behavior if no other restrictive community is attached.
No_Advertise- Prevents the route from being advertised toanypeer.
No_Export- Prevents the route from being advertised toEBGP peers.
No_Export_Subconfed- Restricts the route from being advertisedoutside the sub-ASin a confederation.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"The Internet community attribute allows unrestricted advertisement of a route. Other community attributes like No_Advertise and No_Export limit route propagation." (Chapter: BGP Community Attributes - Section: Well-known Communities)
NEW QUESTION # 20
Which of the following TLVs is used by ISIS to describe the IP address of an interface?
Answer: B
Explanation:
In the IS-IS protocol, TLV 129 (IPv4 interface address) is used to describe the IP address of an interface. Each TLV type carries specific information, and TLV 129 specifically relates to interface IP addresses.
NEW QUESTION # 21
A large number of routes typically exist in a BGP routing table, and transmitting such extensive routing information brings a heavy burden to a device. In order to address this problem, it is necessary to filter those routes to be advertised. You can configure a device to advertise only necessary routes or those that its peers require.
Answer: B
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
* BGP Route Filtering:
* BGP provides flexible policies for route filtering to optimize routing table size and reduce network resource usage.
* By configuring route filters, a device can advertise only required routes to peers, thereby improving efficiency.
* Purpose of Filtering:
* Reduces the routing table size.
* Decreases CPU and memory usage on routers.
* Limits unnecessary route propagation.
References:
* HCIA-Datacom Study Guide, Chapter: BGP Policy Control
* Huawei BGP Route Filtering Configuration
NEW QUESTION # 22
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