Which two statements are true regarding RIB groups? (Choose two.)
Correct Answer: AD
The first table listed in a RIB group configuration is the primary route table and determines the address family of the RIB group. This means that the primary route table is pivotal in defining the nature of the address family. A RIB group must contain one or more import-rib statements to specify the secondary route tables that will receive routes from the primary table. These import-rib statements are essential for the functioning of the RIB group as they define the routing tables that will be updated with the routes.
By default, how long will a learned MAC address be retained in the bridge table on an EX Series switch?
Correct Answer: C
An EX Series switch retains a learned MAC address in the bridge table for 300 seconds by default. This period is known as the MAC address aging time. If no traffic from that MAC address is received within this time, the MAC address is removed from the bridge table. The default aging time can be modified if necessary.
If an EX Series switch receives a frame with a known destination MAC address, what is the expected behavior?
Correct Answer: D
When an EX Series switch receives a frame with a known destination MAC address, the switch consults its bridge table to find the matching MAC address. It then sends the frame out through the egress port associated with the destination MAC address within the ingress VLAN. This efficient forwarding method ensures that the frame reaches its intended recipient without unnecessary flooding to all ports.
Your router is learning the 172.25.11.0/24 prefix from both the BGP and OSPF protocols. A routing policy is configured on your device to advertise the prefix to an established BGP peer but the peer is not receiving the prefix. You want to allow the prefix to be advertised to the BGP peer.
What should you do on this router to satisfy this requirement?
Correct Answer: B
When a router learns a prefix from both BGP and OSPF, the router typically selects the route with the highest preference (OSPF in this case) and the other routes are marked as inactive. BGP, by default, does not advertise inactive routes. To allow the prefix 172.25.11.0/24 to be advertised to the BGP peer, you should enable the advertisement of inactive BGP routes. This ensures that even if the route is considered inactive in the BGP table, it can still be advertised.
You have an OSPF NSSA area that is also receiving IS-IS routes on the ASBR.
In this scenario, which LSA type is used to announce external IS-IS routes?
Correct Answer: A
In an OSPF Not-So-Stubby Area (NSSA), external routes such as those from IS-IS are advertised using Type 7 LSAs. These Type 7 LSAs are then translated to Type 5 LSAs by the Area Border Router (ABR) when they are routed into other OSPF areas. Therefore, the correct answer is Type 7.