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Q21. Which two statements about PBR route maps are true? (Choose two.)
A. They can use extended ACLs to identify traffic.
B. They can route unicast traffic without interface-level classification.
C. They can be applied to both ingress and egress traffic.
D. They can classify traffic based on prefix-lists.
E. They can set the metric and IP precedence bits.
Q22. Refer to the exhibit.
Which statement is true?
A. It is impossible for the destination interface to equal the source interface.
B. NAT on a stick is performed on interface Et0/0.
C. There is a potential routing loop.
D. This output represents a UDP flow or a TCP flow.
In this example we see that the source interface and destination interface are the same (Et0/0). Typically this is seen when there is a routing loop for the destination IP address.
Q23. Refer to the exhibit.
Which AS paths are matched by this access list?
A. the origin AS 64496 only
B. the origin AS 64496 and any ASs after AS 64496
C. the directly attached AS 64496 and any ASs directly attached to AS 64496
D. the directly attached AS 64496 and any longer AS paths
If you want AS 1 to get networks originated from AS 4 and all directly attached ASs of AS 4, apply the following inbound filter on Router 1. ip as-path access-list 1 permit ^4_[0-9]*$ router bgp 1 neighbor 220.127.116.11 remote-as 4 neighbor 18.104.22.168 route-map foo in route-map foo permit 10 match as-path 1 In the ip as-path access-list command, the carat (^) starts the input string and designates "AS". The underscore (_) means there is a a null string in the string that follows "AS 4". The [0-9]* specifies that any connected AS with a valid AS number can pass the filter. The advantage of using the [0-9]* syntax is that it gives you the flexibility to add any number of ASs without modifying this command string.
Q24. Which two protocols are used to establish IPv6 connectivity over an MPLS network? (Choose two.)
Q25. Which IPv6 prefix is used for 6to4 tunnel addresses?
6to4 works by taking advantage of a reserved IPv6 prefix, 2002::/16. A 6to4 tunnel interface automatically converts the 32 bits in its IPv6 address following this prefix to a global unicast IPv4 address for transport across an IPv4 network such as the public Internet.
Q26. Which two statements about EIGRP load balancing are true? (Choose two.)
A. EIGRP supports 6 unequal-cost paths.
B. A path can be used for load balancing only if it is a feasible successor.
C. EIGRP supports unequal-cost paths by default.
D. Any path in the EIGRP topology table can be used for unequal-cost load balancing.
E. Cisco Express Forwarding is required to load-balance across interfaces.
Q27. Which set of commands conditionally advertises 172.16.0.0/24 as long as 10.10.10.10/32 is in the routing table?
A. Option A
B. Option B
C. Option C
D. Option D
Advertise maps are used for conditional routing to advertise specified prefixes if something which is specified in exist map exists. In our question we need to advertise 172.16.0.0/24 if 10.10.10.10/32 exists in the routing table so we have to use commanD. “neighbor x.x.x.x advertise-map <prefix-list of 172.16.0.0/24> exist-map <prefix-list of 10.10.10.10/32>”. Therefore B is correct.
Q28. Which implementation can cause packet loss when the network includes asymmetric routing paths?
A. the use of ECMP routing
B. the use of penultimate hop popping
C. the use of Unicast RPF
D. disabling Cisco Express Forwarding
When administrators use Unicast RPF in strict mode, the packet must be received on the interface that the router would use to forward the return packet. Unicast RPF configured in strict mode may drop legitimate traffic that is received on an interface that was not the router's choice for sending return traffic. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network.
Q29. Refer to the exhibit.
Which command is configured on this router?
A. bgp update-delay 60
B. neighbor 10.100.1.1 maximum-prefix 200
C. neighbor 10.100.1.1 maximum-path 2
D. neighbor 10.100.1.1 ebgp-multihop 2
The BGP Maximum-Prefix feature allows you to control how many prefixes can be received from a neighbor. By default, this feature allows a router to bring down a peer when the number of received prefixes from that peer exceeds the configured Maximum-Prefix limit. This feature is commonly used for external BGP peers, but can be applied to internal BGP peers also. When the maximum number of prefixes has been received, the BGP sessions closes into the IDLE state.
Q30. Which two configuration changes should be made on the OTP interface of an EIGRP OTP route reflector? (Choose two.)
B. no split-horizon
C. no next-hop-self
D. hello-interval 60, hold-time 180
The EIGRP Over the Top feature enables a single end-to-end Enhanced Interior Gateway Routing Protocol (EIGRP) routing domain that is transparent to the underlying public or private WAN transport that is used for connecting disparate EIGRP customer sites. When an enterprise extends its connectivity across multiple sites through a private or a public WAN connection, the service provider mandates that the enterprise use an additional routing protocol, typically the Border Gateway Protocol (BGP), over the WAN links to ensure end-to-end routing. The use of an additional protocol causes additional complexities for the enterprise, such as additional routing processes and sustained interaction between EIGRP and the routing protocol to ensure connectivity, for the enterprise. With the EIGRP Over the Top feature, routing is consolidated into a single protocol (EIGRP) across the WAN.
Perform this task to configure a customer edge (CE) device in a network to function as an EIGRP Route Reflector:
2. configure terminal
3. router eigrp virtual-name
4. address-family ipv4 unicast autonomous-system as-number
5. af-interface interface-type interface-number
6. no next-hop-self
7. no split-horizon
9. remote-neighbors source interface-type interface-number unicast-listen lisp-encap
10. network ip-address
Note. Use no next-hop-self to instruct EIGRP to use the received next hop and not the local outbound interface address as the next hop to be advertised to neighboring devices. If no next-hop-self is not configured, the data traffic will flow through the EIGRP Route Reflector.