DRAG DROP (Drag and Drop is not supported)An AR router is configured with two IP prefix lists. Drag the routes received by the router to the IP prefix lists that the routes can match. (Token is reusable)Select and Place:
Answer(s): A
1.1.1.1/32 matches ip-prefix List1 (because 1.1.1.0/24 greater-equal 24 and less-equal 27 allows this specific route).1.1.1.0/30 matches ip-prefix List1 (it is within the range specified for List1, which allows networks between /24 and /27).1.1.1.0/28 matches ip-prefix List1 (since this also falls under the greater-equal 24 and less-equal 27 condition).1.1.1.0/26 matches ip-prefix List1 (this is within the valid range based on the prefix conditions). 1.1.1.0/24 matches ip-prefix List2 (this falls under the condition 0.0.0.0/27 less-equal 32).
After a BGP device establishes a peer relationship with a peer, it advertises routes to the peer. Which of the following statements are true about BGP route advertisement? (Choose all that apply.)
Answer(s): C,D
When there are multiple valid routes to the same destination, a BGP device advertises only the optimal route to its peers.BGP uses the best path selection algorithm to choose the optimal route to a destination and only advertises that route to its peers.Routes obtained from an IBGP peer are not sent to other IBGP peers.In BGP, by default, IBGP routes are not advertised to other IBGP peers. This rule prevents routing loops and is known as the IBGP split horizon rule. If an IBGP peer needs to advertise a route to another IBGP peer, it must first advertise it to an EBGP peer.
The Next_Hop attribute in BGP records the next hop of a route. Similar to the next hop in an IGP, the Next_Hop attribute in BGP must be the IP address of a peer interface.
Answer(s): B
The Next_Hop attribute in BGP does not necessarily have to be the IP address of a peer interface. It represents the next hop IP address that should be used to reach the destination, which is typically the IP address of the next-hop router in the path. In the case of EBGP (External BGP), the Next_Hop is usually the IP address of the EBGP peer's interface, but in IBGP (Internal BGP), the Next_Hop is not changed when the route is propagated between IBGP peers. The Next_Hop can be a different address if route redistribution or policy-based routing is used.
A BGP device receives a route carrying an unknown attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers. Which of the following attributes is of this type?
The Originator_ID is an optional BGP attribute, used primarily in BGP route reflection to prevent routing loops.If a BGP device receives a route with this unknown attribute and does not know whether other devices need it, it will retain the attribute and advertise it to its peers as part of the route. This behavior is typical of optional attributes in BGP.
In special scenarios, when advertising routes to an IBGP peer, a BGP device needs to set the next hop to its IP address to prevent blackhole routes. Which of the following commands can be run in this case?
This command ensures that when advertising routes to an IBGP peer, the Next_Hop attribute is set to the local router's IP address, which prevents potential blackhole routes in the network. This is useful when a BGP device needs to advertise a route within the same AS without relying on the external next-hop IP.
NETCONF is a network configuration protocol that automates network configuration in a programmable manner, simplifying and accelerating network service deployment. Which of the following operations can be performed by using this protocol? (Choose all that apply.)
Answer(s): A,B,C,D
Restoring configurations: NETCONF can be used to restore configurations to a device by retrieving and applying previously saved configurations.Modifying configurations: NETCONF allows network configurations to be modified programmatically by sending configuration updates or changes to the network devices.Deleting configurations: NETCONF also supports the deletion of configurations from network devices.Backing up configurations: While NETCONF itself is primarily used for managing and applying configurations, it can also be used to back up configurations by retrieving the current configurations from network devices and saving them.
A large enterprise deploys a WLAN in N+l backup mode. In this scenario, an AP will trigger an active/standby switchover of ACs if it does not receive CAPWAP heartbeat detection packets from its active AC for a specified period of time, known as the timeout period. Which of the following is the default timeout period?
The default timeout period for CAPWAP heartbeat detection packets in a WLAN using N+1 backup mode is 90 seconds. If the AP does not receive heartbeat packets from its active AC within this time, it will trigger a switchover to the standby AC.
A large shopping mall configures a VLAN pool to prevent network performance deterioration caused by potentially large broadcast domains. A network engineer runs the display vlan pool name STA command to check information about the VLAN pool. The following command output is displayed:Given this, which of the following statements are true? (Choose all that apply.)
Answer(s): B,D
The VLANs with the IDs of 2 and 4 are added to the VLAN pool.The command output shows that the VLAN IDs are 2 and 4, meaning these VLANs are part of the STA VLAN pool.The name of the VLAN pool is STA.The command output clearly indicates that the name of the VLAN pool is STA.
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