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Q1. Which action does route poisoning take that serves as a loop-prevention method?
A. It immediately sends routing updates with an unreachable metric to all devices.
B. It immediately sends routing updates with a metric of 255 to all devices.
C. It prohibits a router from advertising back onto the interface from which it was learned.
D. It advertises a route with an unreachable metric back onto the interface from which it was learned.
E. It poisons the route by tagging it uniquely within the network.
Answer: A
Explanation:
With route poisoning, when a router detects that one of its connected routes has failed, the router will poison the route by assigning an infinite metric to it and advertising it to neighbors.
Q2. Which configuration sets a minimum quality of service on a Layer 2 access switch?
A. mls qos cos override
mls qos cos 2
B. mls qos cos 2
C. mls qos trust cos
mls qos cos 2
D. mls qos trust cos
E. mls qos trust dscp
Answer: A
Explanation:
The mls qos cos override interface command must be used to ensure that untrusted CoS values are explicitly set 0 (default).
Reference: http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/Qo S-SRND-Book/QoSDesign.html
Q3. Refer to the exhibit.
R1 is configured as shown. R1 is able to establish a neighbor adjacency only with R2. Which addition must you make to the R1 configuration to allow it to establish an adjacency with R3?
A. interface gigabitethernet 0/1
ip address 10.1.0.1 255.255.255.0
ip ospf network point-to-point
B. interface gigabitethernet 0/1
ip address 10.1.0.1 255.255.255.0
ip ospf 1 area 0
C. router ospf 1
network 10.1.0.0 0.0.0.255 area 1
D. router ospf 1
area 0 stub
Answer: C
Explanation:
To enable interfaces and networks with OSPF, the networks need to be specified in the network statement. In the configuration shown, only 10.0.0.0/24 has been enabled, we are missing the network connecting to R3 (10.1.0.0/24).
Q4. Which IP SLA operation type uses IP to measure the round-trip time between a router and a device?
A. HTTP
B. ICMP Echo
C. ICMP Path Jitter
D. UDP Jitter for VoIP
Answer: B
Q5. Which component of MPLS architecture uses protocols such as the label distribution protocol and tag distribution protocol to exchange labels?
A. control plane
B. data plane
C. forwarding plane
D. routing plane
Answer: A
Q6. In which two modes do IPv6-in-IPv4 tunnels operate? (Choose two.)
A. tunnel mode
B. transport mode
C. 6to4 mode
D. 4to6 mode
E. ISATAP mode
Answer: C,E
Explanation:
*There are 5 tunneling solution in IPv6:*
*1. Using the “Tunnel mode ipv6ip”, in this case the tunnel source and destination are configured with IPv4 addressing and the tunnel interface is configured with IPv6. This will use protocol 41. This is used for IPv6/IPv4.
*
R1(config)#int tunnel 1
R1(config-if)#ipv6 address 12:1:12::1/64
R1(config-if)#tunnel source 10.1.12.1
R1(config-if)#tunnel destination 10.1.12.2
R1(config-if)#*tunnel mode ipv6ip*
*
2. Using the “Tunnel mode gre ipv6, in this case the tunnel source and destination are all configured with IPv6 addressing. This is used for IPv6/IPv6.
*
BB1(config)#int tunnel 1
BB1(config-if)#ipv6 address 121:1:121::111/64
BB1(config-if)#tunnel source 10:1:111::111
BB1(config-if)#tunnel destination 10:1:112::112
BB1(config-if)#*tunnel mode gre ipv6*
*3.
In this case, the third type, the tunnel mode is NOT used at all, note that the tunnel interface is configured with IPv6 and the tunnel source and destination is configured with IPv4 but no mention of tunnel mode. This configuration will use protocol 47. This is used for IPv6/IPv4.
*
R1(config)#int tunnel 13
R1(config-if)#ipv6 address 13:1:13::1/64
R1(config-if)#tunnel source 10.1.13.1
R1(config-if)#tunnel destination 10.1.13.3
*4. Note in this case a special addressing is assigned to the tunnel interface which is a concatenation of a reserved IPv6 address of 2002followed by the translated IPv4 address of a given interface on the router. In this configuration ONLY the tunnel source address is used and since the tunnel is automatic, the destination address is NOT configured. The tunnel mode is set to “Tunnel mode ipv6ip 6to4. Note the IPv4 address of 10.1.1.1 is translated to 0A.01.01.01 and once concatenated, it will be “2002:0A01:0101: or 2002:A01:101. This is used for IPv6/IPv4.
*
R1(config)#interface Tunnel14
R1(config-if)#ipv6 address 2002:A01:101::/128
R1(config-if)#tunnel source 10.1.1.1
R1(config-if)#*tunnel mode ipv6ip 6to4*
*5. ISATAP, ISATAP works like 6to4 tunnels, with one major difference, it uses a special IPv6 address which is formed as follows: *
*In this tunnel mode, the network portion can be any IPv6 address, whereas in 6to4 it had to start with 2002.*
*Note when the IPv6 address is assigned to the tunnel interface, the “eui-64 is used, in this case the host portion of the IPv6 address starts with “0000.5EFE” and then the rest of the host portion is the translated IPv4 address of the tunnel’s source IPv4 address. This translation is performed automatically unlike 6to4. This is used for IPv6/IPv4.*
R4(config)#int tunnel 46
R4(config-if)#ipv6 address 46:1:46::/64 eui-64
R4(config-if)#tunnel source 10.44.44.44
R4(config-if)#*tunnel mode ipv6ip ISATAP*
Q7. Which option describes what the default RT filter indicates when you implement the BGP RT constrained route distribution feature?
A. A peer receives only a default route for each VRF.
B. A peer receives all routes, regardless of the RT value.
C. A peer receives routes only for RTs that are used on that router.
D. A peer receives no routes, regardless of the RT value.
Answer: B
Q8. Which two options are requirements for Control-Plane Policing? (Choose two.)
A. Cisco Express Forwarding must be enabled globally.
B. Cisco Discovery Protocol must be disabled in the control plane.
C. A crypto policy must be installed.
D. A loopback address must be configured for device access.
E. A class map must be configured to identify traffic.
Answer: A,E
Q9. In which 802.1D port state are the root bridge, the root port, and the designated port(s) elected?
A. Listening
B. learning
C. forwarding
D. blocking
E. disabled
Answer: A
Explanation:
STP switch port states:
. Blocking – A port that would cause a switching loop if it were active. No user data is sent or received over a blocking port, but it may go into forwarding mode if the other links in use fail and the spanning tree algorithm determines the port may transition to the forwarding state. BPDU data is still received in blocking state. Prevents the use of looped paths.
. Listening – The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state. It does not populate the MAC address table and it does not forward frames. In this state the root bridge, the root port, and the designated port(s) are elected.
. Learning – While the port does not yet forward frames it does learn source addresses from frames received and adds them to the filtering database (switching database). It populates the MAC Address table, but does not forward frames.
. Forwarding – A port receiving and sending data, normal operation. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop.
. Disabled – Not strictly part of STP, a network administrator can manually disable a port.
Reference: http://en.wikipedia.org/wiki/Spanning_Tree_Protocol
Q10. DRAG DROP
Drag and drop the IPv6 address on the left to the correct IPv6 address type on the right.
Answer: