Far out Cisco 400-101 - An Overview 141 to 150
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2021 Apr 400-101 free practice questions
Q141. Which term describes an EIGRP route that has feasible successors?
A topology table entry for a destination can have one of two states. A route is considered in the Passive state when a router is not performing a route recomputation. The route is in Active state when a router is undergoing a route recomputation. If there are always feasible successors, a route never has to go into Active state and avoids a route recomputation.
When there are no feasible successors, a route goes into Active state and a route recomputation occurs. A route recomputation commences with a router sending a query packet to all neighbors. Neighboring routers can either reply if they have feasible successors for the destination or optionally return a query indicating that they are performing a route recomputation. While in Active state, a router cannot change the next-hop neighbor it is using to forward packets. Once all replies are received for a given query, the destination can transition to Passive state and a new successor can be selected.
Q142. Which two packet types does an RTP session consist of? (Choose two.)
An RTP session is established for each multimedia stream. A session consists of an IP address with a pair of ports for RTP and RTCP. For example, audio and video streams use separate RTP sessions, enabling a receiver to deselect a particular stream. The ports which form a session are negotiated using other protocols such as RTSP (using SDP in the setup method) and SIP. According to the specification, an RTP port should be even and the RTCP port is the next higher odd port number.
Q143. 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
. 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
Q144. Which two statements about the C-bit and PW type are true? (Choose two.)
A. The C-bit is 1 byte and the PW type is 15 bytes.
B. The PW type indicates the type of pseudowire.
C. The C-bit is 3 bits and the PW type is 10 bits.
D. The C-bit set to 1 indicates a control word is present.
E. The PW type indicates the encryption type.
The control word carries generic and Layer 2 payload-specific information. If the C-bit is set to 1, the advertising PE expects the control word to be present in every pseudowire packet on the pseudowire that is being signaled. If the C-bit is set to 0, no control word is expected to be present. Pseudowire Type—PW Type is a 15-bit field that represents the type of pseudowire.
Q145. Which two attributes were introduced with the Cisco IOS BGP 4-byte ASN feature? (Choose two.)
Up to date 400-101 exam guide:
Q146. Which three statements describe the characteristics of a VPLS architecture? (Choose three.)
A. It forwards Ethernet frames.
B. It maps MAC address destinations to IP next hops.
C. It supports MAC address aging.
D. It replicates broadcast and multicast frames to multiple ports.
E. It conveys MAC address reachability information in a separate control protocol.
F. It can suppress the flooding of traffic.
As a VPLS forwards Ethernet frames at Layer 2, the operation of VPLS is exactly the same as that found within IEEE 802.1 bridges in that VPLS will self learn source MAC address to port associations, and frames are forwarded based upon the destination MAC address. Like other 802.1 bridges, MAC address aging is supported.
Reference: http://www.cisco.com/en/US/products/hw/routers/ps368/products_white_paper09186a0080 1f6084.shtml
Q147. Refer to the exhibit.
Which statement about the device routing table is true?
A. Only networks 10.10.10.0/24 and smaller from host 192.168.168.1 are in the routing table.
B. Only networks 10.10.10.0/24 and larger from host 192.168.168.1 are in the routing table.
C. Only network 10.10.10.0/24 from host 192.168.168.1 is in the routing table.
D. Networks 10.10.10.0/24 and smaller from any host are in the routing table.
When you add the keywords “GE” and “LE” to the prefix-list, the “len” value changes its meaning. When using GE and LE, the len value specifies how many bits of the prefix you are checking, starting with the most significant bit. ip prefix-list LIST permit 188.8.131.52/24 le 32
This means: Check the first 24 bits of the prefix 184.108.40.206 The subnet mask must be less than or equal to 32
Q148. Which bit should be set in the link-state PDU of an IS-IS L1/L2 router to indicate that it is a potential exit point of the area?
A. the ABR bit
B. the ATT bit
C. the down bit
D. the P bit
Default routing is achieved in two distinct ways with Integrated IS-IS:
. Attached bit—Set by a Level 1/Level 2 router in its own Level 1 LSP and used to indicate to all Level 1 routers (within the area) that this router is a potential exit point of the area. Level 1-only routers will default to the nearest attached Level 2 router.
. Default information originate—Can be configured in Level 1 as well as Level 2. The default route (0.0.0.0/0) is inserted in the router LSP (Level 1 or Level 2, according to the configuration command) and the LSP is flooded according to the router type (Level 1 or Level 2). A Level 2 router doesn't need to have a default route to originate a default route.
Reference: http://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a3e6f.sh tml
Q149. Which Carrier Ethernet service supports the multiplexing of multiple point-to-point EVCs across as a single UNI?
Ethernet Relay Service (ERS or EVPL)
An Ethernet Virtual Circuit (EVC) is used to logically connect endpoints, but multiple EVCs
could exist per single UNI. Each EVC is distinguished by 802.1q VLAN tag identification.
The ERS network acts as if the Ethernet frames have crossed a switched network, and certain control traffic is not carried between ends of the EVC. ERS is analogous to Frame Relay where the CE-VLAN tag plays the role of a Data-Link Connection Identifier (DLCI). The MEF term for this service is EVPL.
Q150. In the DiffServ model, which class represents the highest priority with the lowest drop probability?