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Q261. 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
Answer: B
Explanation:
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.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/25160-bgp-maximum-prefix.html
Q262. Which flag in a configuration BPDU instructs all switches to shorten their bridge table aging process from the default 300 seconds to the current forward delay value?
A. topology change bit
B. topology change acknowledgment bit
C. priority bit
D. max-age bit
Answer: A
Explanation:
The Root Bridge continues to set the Topology Change flag (TCN bit) in all Configuration BPDUs that it sends out for a total of Forward Delay + Max Age seconds (default = 35 (20+15) seconds). This flag instructs all bridges to shorten their MAC address table (Bridge table) aging process from the default value of 300 seconds to the current Forward Delay value of the bridge (default=15 seconds). The TCA flag is set by the upstream bridge to tell the downstream bridges to stop sending TCN BPDUs. The TC flag is set in configuration BPDU by the Root Bridge to shorten the bridge table age-out period from default 300 seconds to Forward Delay seconds.
Q263. What is the destination MAC address of a BPDU frame?
A. 01-80-C2-00-00-00
B. 01-00-5E-00-00-00
C. FF-FF-FF-FF-FF-FF
D. 01-80-C6-00-00-01
Answer: A
Explanation:
The root-bridge election process begins by having every switch in the domain believe it is the root and claiming it throughout the network by means of Bridge Protocol Data Units (BPDU). BPDUs are Layer 2 frames multicast to a well-known MAC address in case of IEEE STP (01-80-C2-00-00-00) or vendor-assigned addresses, in other cases.
Reference: http://www.ciscopress.com/articles/article.asp?p=1016582
Q264. Which two statements about the assert process in LAN-based PIM are true? (Choose two.)
A. If the metrics are the same, the router with the lowest advertised routing protocol metric for that route is elected.
B. If the metrics are the same, the router with the highest IP address on the LAN is elected.
C. If the metrics are the same, the router with the highest advertised routing protocol metric for that route is elected.
D. If the metrics are the same, the router with the lowest IP address on the LAN is elected.
Answer: A,B
Q265. Which two Cisco IOS XE commands can install a subpackage onto a router? (Choose two.)
A. request platform software package install rp rpSlotNumber file fileURL
B. boot system flash bootflash:filename
C. copy sourceUrl destinationUrl
D. license install file storedLocationUrl
E. issu loadversion rp identifier file diskType imageFilename
F. config-register value
Answer: A,C
Explanation:
. Managing and Configuring a Consolidated Package Using the request platform software package install Command
In the following example, the request platform software package install command is used to upgrade a consolidated package running on RP 0. The force option, which forces the upgrade past any prompt (such as already having the same consolidated package installed), is used in this example.
Router# request platform software package install rp 0 file bootflash:asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin force
To upgrade a consolidated package on the Cisco ASR 1000 Series Routers using the copy command, copy the consolidated package into the bootflash: directory on the router using the copy command as you would on most other Cisco routers. After making this copy, configure the router to boot using the consolidated package file. In the following example, the consolidated package file is copied onto the bootflash: file system from TFTP. The config-register is then set to boot using boot system commands, and the boot system commands instruct the router to boot using the consolidated package stored in the bootflash: file system. The new configuration is then saved using the copy running-config startup-config command, and the system is then reloaded to complete the process.
Router# dir bootflash:
Directory of bootflash:/
11 drwx 16384 Dec 4 2007 04:32:46 -08:00 lost+found
86401 drwx 4096 Dec 4 2007 06:06:24 -08:00.ssh
14401 drwx 4096 Dec 4 2007 06:06:36 -08:00.rollback_timer
28801 drwx 4096 Mar 18 2008 17:31:17 -07:00.prst_sync
43201 drwx 4096 Dec 4 2007 04:34:45 -08:00.installer
13 -rw- 45977 Apr 9 2008 16:48:46 -07:00 target_support_output.tgz.tgz
928862208 bytes total (712273920 bytes free)
Router# copy tftp bootflash:
Address or name of remote host []? 172.17.16.81
Source filename []? /auto/tftp-users/user/asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin
Destination filename [asr1000rp1-adventerprisek9.02.01.00.122-33.XNA.bin]?
Reference: http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg /Package_Management.html#78189
Q266. Which three statements about OSPFv3 address families are true? (Choose three.)
A. Each address family requires the same instance ID.
B. Address families can perform route redistribution into any IPv4 routing protocol.
C. An address family can have two device processes on each interface.
D. IPv4 address family require an IPv4 address to be configured on the interface.
E. Each address family uses a different shortest path tree.
F. Different address families can share the same link state database.
Answer: B,D,E
Q267. The OSPF database of a router shows LSA types 1, 2, 3 and 7 only. Which type of area is this router connected to?
A. backbone area
B. totally stubby area
C. stub area
D. not-so-stubby area
Answer: D
Q268. 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
Q269. Refer to the exhibit.
Video Source S is sending interactive video traffic to Video Receiver R. Router R1 has multiple routing table entries for destination R. Which load-balancing mechanism on R1 can cause out-of-order video traffic to be received by destination R?
A. per-flow load balancing on R1 for destination R
B. per-source-destination pair load balancing on R1 for destination R
C. CEF load balancing on R1 for destination R
D. per-packet load balancing on R1 for destination R
Answer: D
Explanation:
Per-packet load balancing guarantees equal load across all links, however potentially the packets may arrive out-of-order at the destination as differential delay may exist within the network.
Reference: http://www.cisco.com/en/US/products/hw/modules/ps2033/prod_technical_reference09186 a00800afeb7.html
Q270. DRAG DROP
Drag and drop the NHRP flag on the left to the corresponding meaning on the right.
Answer: