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Q1. Which two statements are true about unicast RPF? (Choose two.)
A. Unicast RPF requires CEF to be enabled.
B. Unicast RPF strict mode works better with multihomed networks.
C. Unicast RPF strict mode supports symmetric paths.
D. Unicast RPF strict mode supports asymmetric paths.
E. CEF is optional with Unicast RPF, but when CEF is enabled it provides better performance.
Answer: A,C
Explanation:
Unicast RPF requires Cisco express forwarding (CEF) to function properly on the router.
Strict Versus Loose Checking Mode
The Unicast RPF in Strict Mode feature filters ingress IPv4 traffic in strict checking mode and forwards packets only if the following conditions are satisfied.
. An IPv4 packet must be received at an interface with the best return path (route) to the packet source (a process called symmetric routing). There must be a route in the Forwarding Information Base (FIB) that matches the route to the receiving interface. Adding a route in the FIB can be done via static route, network statement, or dynamic routing.
. IPv4 source addresses at the receiving interface must match the routing entry for the interface.
References:
http://www.cisco.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfrpf. html
http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/srpf_gsr.html
Q2. DRAG DROP
Drag and drop each DHCP term on the left to the corresponding definition on the right.
Answer:
Q3. Which three protocols support SSM? (Choose three.)
A. IGMPv2
B. IGMPv3
C. IGMP v3lite
D. URD
E. CGMP
F. IGMPv1
Answer: B,C,D
Q4. Refer to the exhibit.
Which two statements about this egress queue are true? (Choose two.)
A. The queue 3 buffer is allocated 20 percent, its drop threshold is 100 percent, and it is guaranteed 400 percent of memory.
B. The queue 1 buffer is allocated 30 percent, its drop threshold is 25 percent, and it is guaranteed 100 percent of memory.
C. The queue 1 buffer is allocated 30 percent, its drop threshold is 100 percent, and it is guaranteed 150 percent of memory.
D. The queue 2 buffer is allocated 30 percent, its drop threshold is 200 percent, and it can use at maximum 400 percent of memory.
E. The queue 3 buffer is allocated 30 percent, its drop threshold is 100 percent, and it can use at maximum 400 percent of memory.
Answer: B,D
Q5. Which two 802.1D port states are expected in a stable Layer 2 network? (Choose two.)
A. forwarding
B. learning
C. listening
D. blocking
E. disabled
Answer: A,D
Q6. DRAG DROP
Drag and drop the DSCP PHB on the left to the corresponding binary representation on the right.
Answer:
Q7. Which three roles does a key server perform when used with GETVPN? (Choose three.)
A. It authenticates group members.
B. It manages security policies.
C. It creates group keys.
D. It distributes multicast replication policies.
E. It distributes multicast replication keys.
F. It configures and routes the GDOI protocol.
Answer: A,B,C
Explanation:
Key server is responsible for maintaining security policies, authenticating the Group Members and providing the session key for encrypting traffic. KS authenticates the individual GMs at the time of registration. Only after successful registration the GMs can participate in group SA.
Reference: http://www.cisco.com/c/en/us/products/collateral/security/group-encrypted-transport-vpn/deployment_guide_c07_554713.html
Q8. Which three statements about EIGRP wide metrics are true? (Choose three.)
A. The maximum metric is 65536.
B. The default delay is 1,000,000 picoseconds.
C. They allow up to 100 hops.
D. They allow up to 256 hops.
E. The default delay is 1,000,000 milliseconds.
F. The maximum metric is 51200.
Answer: A,B,C
Q9. Two routers are trying to establish an OSPFv3 adjacency over an Ethernet link, but the adjacency is not forming. Which two options are possible reasons that prevent OSPFv3 to form between these two routers? (Choose two.)
A. mismatch of subnet masks
B. mismatch of network types
C. mismatch of authentication types
D. mismatch of instance IDs
E. mismatch of area types
Answer: D,E
Explanation:
An OSPFv3 interface must have a compatible configuration with a remote interface before the two can be considered neighbors. The two OSPFv3 interfaces must match the following criteria:
. Hello interval
. Dead interval
. Area ID
. Optional capabilities
The OSPFv3 header includes an instance ID field to identify that OSPFv3 packet for a particular OSPFv3 instance. You can assign the OSPFv3 instance. The interface drops all OSPFv3 packets that do not have a matching OSPFv3 instance ID in the packet header.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/unicast/configuration/guide/l3_cli_nxos/l3_ospfv3.html
Q10. DRAG DROP
Drag and drop the multicast protocol definition on the left to the correct default time interval on the right.
Answer: