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Q191. Refer to the exhibit. 

Which BGP feature allows R1 to instruct R2 which prefixes it is allowed to advertise to R1? 

A. route refresh 

B. Prefix-Based Outbound Route Filtering 

C. distribute lists 

D. prefix lists 

Answer:


Q192. Which statement about the BGP originator ID is true? 

A. The route reflector always sets the originator ID to its own router ID. 

B. The route reflector sets the originator ID to the router ID of the route reflector client that injects the route into the AS. 

C. The route reflector client that injects the route into the AS sets the originator ID to its own router ID. 

D. The originator ID is set to match the cluster ID. 

Answer:

Explanation: 

An RR reflecting the route received from a RR-Client adds: 

. Originator ID- a 4-byte BGP attribute that is created by the RR. This attribute carries the Router ID of the originator of the route in the local AS. If the update comes back to the originator, it ignores the update. 

. Cluster List- A Cluster List is a list of Cluster IDs that an update has traversed. When a route reflector sends a route received from a client to a non-client, it appends the local Cluster ID. If a route reflector receives a route whose Cluster List contains the local Cluster ID, it ignores the update. 

Reference: https://sites.google.com/site/amitsciscozone/home/bgp/bgp-route-reflectors 


Q193. In which way does the Bridge Assurance mechanism modify the default spanning-tree behavior in an effort to prevent bridging loops? 

A. Received BPDUs are looped back toward the sender to ensure that the link is bidirectional. 

B. If BPDUs are no longer received on a port, the switch immediately sends out a TCN BPDU. 

C. Extended topology information is encoded into all BPDUs. 

D. BPDUs are sent bidirectional on all active network ports, including blocked and alternate ports. 

Answer:


Q194. Refer to the exhibit. 

What kind of problem is detected? 

A. The packet types that are being sent are unknown. 

B. The maximum MTU size that can be used is 1492. 

C. Waiting for a reply timed out. 

D. Fragmentation starts to occur when the MTU of 1472 is reached. 

Answer:


Q195. Which two statements about BGP loop prevention are true? (Choose two.) 

A. Advertisements from PE routers with per-neighbor SOO configured include a Site of Origin value that is equal to the configured value of the BGP peering. 

B. If the configured Site of Origin value of a BGP peering is equal to the Site of Origin value on a route it receives, route advertisement is blocked to prevent a route loop. 

C. AS-override aids BGP loop prevention, but alternate loop prevention mechanisms are also necessary. 

D. Advertisements from the neighbors a BGP peering include a Site of Origin value that is separate from the configured value of the BGP peering. 

E. If the configured Site of Origin value of a BGP peering is greater than the Site of Origin value on a route it receives, route advertisement is blocked to prevent a route loop. 

F. If the configured Site of Origin value of a BGP peering is equal to the Site of Origin value on a route it receives, route advertisement is permitted. 

Answer: A,B 


Q196. Refer to the exhibit. 

R2 is unable to access the 172.16.1.0/30 network between R1 and R3. Which option is a possible reason for the failure? 

A. The seed metric for redistributing into RIP on R3 is missing. 

B. The OSPF processes on R2 and R3 are different. 

C. Auto-summary is misconfigured under the RIP process of R3. 

D. The subnet mask on the link between R2 and R3 is smaller than /30. 

E. The wildcard mask on R3 is misconfigured. 

Answer:

Explanation: 

The problem is that RIP requires a seed metric to be specified when redistributing routes into that protocol. A seed metric is a "starter metric" that gives the RIP process a metric it can work with. The OSPF metric of cost is incomprehensible to RIP, since RIP's sole metric is hop count. 

Reference: http://www.thebryantadvantage.com/CCNP%20Certification%20BSCI%20Exam%20Tutoria l%20Route%20Redistribution%20Seed%20Metric.htm 


Q197. Refer to the exhibit. 

If the route to 10.1.1.1 is removed from the R2 routing table, which server becomes the master NTP server? 

A. R2 

B. the NTP server at 10.3.3.3 

C. the NTP server at 10.4.4.4 

D. the NTP server with the lowest stratum number 

Answer:

Explanation: 

NTP uses a concept called “stratum” that defines how many NTP hops away a device is from an authoritative time source. For example, a device with stratum 1 is a very accurate device and might have an atomic clock attached to it. Another NTP server that is using this stratum 1 server to sync its own time would be a stratum 2 device because it’s one NTP hop further away from the source. When you configure multiple NTP servers, the client will prefer the NTP server with the lowest stratum value. 

Reference: https://networklessons.com/network-services/cisco-network-time-protocol-ntp/ 


Q198. Which statement is true regarding UDLD and STP timers? 

A. The UDLD message timer should be two times the STP forward delay to prevent loops. 

B. UDLD and STP are unrelated features, and there is no relation between the timers. 

C. The timers need to be synced by using the spanning-tree udld-sync command. 

D. The timers should be set in such a way that UDLD is detected before the STP forward delay expires. 

Answer:

Explanation: 

UDLD is designed to be a helper for STP. Therefore, UDLD should be able to detect an unidirectional link before STP would unblock the port due to missed BPDUs. Thus, when you configure UDLD timers, make sure your values are set so that unidirectional link is detected before “STP MaxAge + 2xForwardDelay” expires. 

Reference: http://blog.ine.com/tag/stp/ 


Q199. Refer to the exhibit. 

The customer wants to use IP SLA to create a failover to ISP2 when both Ethernet connections to ISP1 are down. The customer also requires that both connections to ISP1 are utilized during normal operations. 

Which IP route configuration accomplishes these requirements for the customer? 

A. ip route 0.0.0.0 0.0.0.0 192.168.0.1 track 1 

ip route 0.0.0.0 0.0.0.0 192.168.1.1 track 2 

ip route 0.0.0.0 0.0.0.0 192.168.2.1 track 3 

B. ip route 0.0.0.0 0.0.0.0 192.168.0.1 track 1 

ip route 0.0.0.0 0.0.0.0 192.168.1.1 track 2 

ip route 0.0.0.0 0.0.0.0 192.168.2.1 track 4.100 

C. ip route 0.0.0.0 0.0.0.0 192.168.0.1 track 1 

ip route 0.0.0.0 0.0.0.0 192.168.1.1 track 2 

ip route 0.0.0.0 0.0.0.0 192.168.2.1 track 3.100 

D. ip route 0.0.0.0 0.0.0.0 192.168.0.1 track 1 1 

ip route 0.0.0.0 0.0.0.0 192.168.1.1 track 2 2 

ip route 0.0.0.0 0.0.0.0 192.168.2.1 track 3 3 

Answer:


Q200. Which three statements about DMVPN are true? (Choose three.) 

A. It facilitates zero-touch configuration for addition of new spokes. 

B. It supports dynamically addressed spokes using DHCP. 

C. It features automatic IPsec triggering for building an IPsec tunnel. 

D. It requires uses of IPsec to build the DMVPN cloud. 

E. Spokes can build tunnels to other spokes and exchange traffic directly. 

F. It supports server load balancing on the spokes. 

Answer: A,C,E