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Q1. 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)
B)
C)
D)
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Explanation:
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.
Q2. Which option is the most effective action to avoid packet loss due to microbursts?
A. Implement larger buffers.
B. Install a faster CPU.
C. Install a faster network interface.
D. Configure a larger tx-ring size.
Answer: A
Explanation:
You can't avoid or prevent them as such without modifying the sending host's application/network stack so it smoothes out the bursts. However, you can manage
microbursts by tuning the size of receive buffers / rings to absorb occasional microbursts.
Q3. Refer to the exhibit.
Which two statements about the EEM applet configuration are true? (Choose two.)
A. The EEM applet runs before the CLI command is executed.
B. The EEM applet runs after the CLI command is executed.
C. The EEM applet requires a case-insensitive response.
D. The running configuration is displayed only if the letter Y is entered at the CLI.
Answer: A,D
Explanation:
sync Indicates whether the policy should be executed synchronously before the CLI command executes.
. If the yes keyword is specified, the policy will run synchronously with the CLI command.
. If the no keyword is specified, the policy will run asynchronously with the CLI command.
nocase
(Optional) Specifies case insensitive comparison.
Here we see that the sync knob was enabled so A is correct. However, C is not correct as the nocase argument was not used, so the applet is configured to display the config only if a capital Y is issued.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/eem/command/eem-cr-book/eem-cr-a2.html
Q4. If two OSPF type 3 prefixes have the same metric, and are within the same process, which prefix(es) are installed into the routing table?
A. The route whose originator has the lower router ID.
B. Both routes are installed.
C. The route whose originator has the higher router ID.
D. The first route that is learned.
Answer: B
Explanation:
OSPF allows multiple equal-cost paths to the same destination. Since all link-state information is flooded and used in the SPF calculation, multiple equal cost paths can be computed and used for routing, and each route will be installed in the routing table.
Q5. Refer to the exhibit.
Which three statements about the device with this configuration are true? (Choose three.)
A. Multiple AFIs are configured on the device.
B. The authentication on 172.16.129.7 is configured incorrectly.
C. The device is configured to support MPLS VPNs.
D. This device is configured with a single AFI.
E. The authentication on 172.16.129.4 is configured incorrectly.
F. The device is configured to support L2VPNs.
Answer: A,B,C
Q6. Refer to the exhibit.
What kind of load balancing is done on this router?
A. per-packet load balancing
B. per-flow load balancing
C. per-label load balancing
D. star round-robin load balancing
Answer: A
Explanation:
Here we can see that for the same traffic source/destination pair of 10.0.0.1 to 14.0.0.2 there were a total of 100 packets (shown by second entry without the *) and that the packets were distributed evenly across the three different outgoing interfaces (34, 33, 33 packets, respectively.
Q7. Which two statements about OSPF route types are true? (Choose two.)
A. The cost of an external type 2 route is the sum of the external and internal costs.
B. The cost of an external type 2 route is the same as the external cost.
C. Intra-area routes originate outside of their area.
D. Inter-area routes originate inside their area.
E. The cost of an external type 1 route is the same as the internal cost.
F. For routes to the same destination, external type 1 routes are preferred over external type 2 routes.
Answer: B,F
Explanation:
External routes fall under two categories, external type 1 and external type 2. The difference between the two is in the way the cost (metric) of the route is being calculated. The cost of a type 2 route is always the external cost, irrespective of the interior cost to reach that route. A type 1 cost is the addition of the external cost and the internal cost used to reach that route. A type 1 route is always preferred over a type 2 route for the same destination.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html
Q8. Refer to the exhibit.
Which statement is true about a valid IPv6 address that can be configured on tunnel interface0?
A. There is not enough information to calculate the IPv6 address.
B. 6to4 tunneling allows you to use any IPv6 address.
C. 2001:7DCB:5901::/128 is a valid IPv6 address.
D. 2002:7DCB:5901::/128 is a valid IPv6 address.
Answer: D
Explanation:
Most IPv6 networks use autoconfiguration, which requires the last 64 bits for the host. The first 64 bits are the IPv6 prefix. The first 16 bits of the prefix are always 2002:, the next 32 bits are the IPv4 address, and the last 16 bits of the prefix are available for addressing multiple IPv6 subnets behind the same 6to4 router. Since the IPv6 hosts using autoconfiguration already have determined the unique 64 bit host portion of their address, they must simply wait for a Router Advertisement indicating the first 64 bits of prefix to have a complete IPv6 address. A 6to4 router will know to send an encapsulated packet directly over IPv4 if the first 16 bits are 2002, using the next 32 as the destination, or otherwise send the packet to a well-known relay server, which has access to native IPv6.
Reference: http://en.wikipedia.org/wiki/6to4
Q9. DRAG DROP
Drag and drop each BGP attribute on the left to the matching description on the right.
Answer:
Q10. Which two options are signaling protocols that are used in MPLS? (Choose two.)
A. LDP
B. RSVP
C. BFD
D. LISP
E. CLNS
F. CDP
Answer: A,B
Explanation:
* Signaling is the means by which LSRs all along the path know that they are a part of a given LSP. It is a signaling function by which the LSR knows that the internal transit path for the LSP depicted goes from Interface 2 to Interface 4.
* Label distribution is the means by which an LSR tells an upstream LSR what label value to use for a particular LSP.
There are four protocols that can perform the label distribution function:
* Label Distribution Protocol (LDP)
* Resource Reservation Protocol with Traffic Engineering Extensions (RSVP-TE)
* Constraint-Based Routed LDP (CR-LDP)
* Multiprotocol BGP
LDP and RSVP-TE are the two most commonly used label distribution protocols
Reference: http://www.networkworld.com/article/2237487/cisco-subnet/understanding-mpls-label-distribution.html