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QUESTION 355
Which of the following label operations can be performed by a P router that is not a penultimate router in the MPLS VPN path?
A. Pop
B. Purge
C. Push
D. Swap
Correct Answer: D Section: (none) Explanation
Explanation/Reference: QUESTION 356
If labels are being distributed in an MPLS network but no labels are being allocated for local routes, what could be the problem?
A. There is an error with the conditional label distribution configurat on.
B. CEF is disabled on the LSR.
C. There are no LDP neighborships established to the LSR.
D. CEF is not enabled on an input interface.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 357
If you use the configuration statement “mpls mtu 1512” how many labels in a label stack are being allowed for?
A. 3
B. 2
C. 4
D. 1
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 358
In an MPLS domain that carries BGP traffic it is best to use host routes without summarization for BGP next hop addresses. True or false?
A. False
B. True
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 359
How is the TTL field in the label header generated?
A. It is set to a number equal to the number of hops in the MPLS path plus 1.
B. It is copied from the TTL field in the IP header on ingress.
C. It is copied from the TTL field in the IP header on egress.
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QUESTION 286
What is true about TDP and LDP?
A. They can coexist in an MPLS network providing peers use the same type.
B. They are compatible between peers of differing type.
C. They are functionally equivalent but incompatible.
D. An MPLS network must use only one type throughout.
Correct Answer: AC Section: (none) Explanation
Explanation/Reference:
QUESTION 287
How many bits are there in the label field of an MPLS label?
A. 24
B. 30
C. 16
D. 20
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 288
In multicast IP routing what entity is assigned a unique FEC?
A. An IGP prefix in conjunction with a class of service.
B. An egress router.
C. An IGP prefix.
D. A destination multicast address.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 289
When using a hub and spoke VPN topology and EBGP as the PE to CE protocol it is necessary to implement allowas-in on the PE router that connects to the customer hub site. True or false?
A. True
B. False Correct Answer: A
Section: (none) Explanation
Explanation/Reference:
QUESTION 290
How many interfaces can be associated to a VRF?
A. 1
B. 2
C. 0
D. Many
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 291
Which of the following correctly configures simple per-VRF OSPF?
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QUESTION 191
In a VoIP environment when speech samples are framed every 20 ms. a payload of 20 bytes is generated. Assuming a total packet length of 60 bytes, what is the length of the packet header if cRTP is deploued without redundancy checks?
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A. 1 byte
B. 2 bytes
C. 3 bytes
D. 4 bytes
E. 20 bytes
F. 40 bytes
Correct Answer: B Section: (none) Explanation
QUESTION 192
What does the PBX use to determine the destination of a call?
A. An ISDN ANI packet
B. A blocked/permitted call list
C. An analysis of the dialled digits
D. Historic requests from the specific phone extension
Correct Answer: C Section: (none) Explanation
QUESTION 193
Which of the following are CS-ACELP coding schemes? (Choose two)
A. G.711
B. G.728
C. G.729
D. Q.931
E. G-729A
Correct Answer: CE Section: (none) Explanation
QUESTION 194
Which of the following is the worst-case compression delay for CD-ACELP?
A. 2.5 ms
B. 5 ms
C. 7.5ms
D. 10 ms
E. 20 ms
Correct Answer: E Section: (none) Explanation
QUESTION 195
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What type of connection is considered a call leg?
A. A digital connection
B. A virtual connection
C. A logical connection
D. A physical connection
E. A hardwired connection
Correct Answer: C Section: (none) Explanation
QUESTION 196
To which layer of the OSI model does Q.921 signaling equatesto in ISDN?
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QUESTION 149
Which three characteristics apply to IS-IS but not to OSPF? (Choose three.)
A. encapsulates PDUs directly into a data-link frame
B. uses a DIS and a backup DIS to present the psuedo-node on the LAN
C. uses stubby areas to improve network scalability
D. uses a default IOS metric of 10 on each interface
E. runs PRC (Partial Route Calculations) to calculate IP reachability information
F. uses an on-demand circuit to reduce the hello and LSA flooding across switched WAN links, such as ISDN
Correct Answer: ADE Section: (none) Explanation
Explanation/Reference:
QUESTION 150
Refer to the exhibit. What are two important facts in interpreting the output of the show ip pim interface command? (Choose two.)
A. Multiaccess segments elect a DR based on lowest IP address.
B. Multiaccess segments elect a DR based on highest IP address.
C. Multiaccess, multicast segments do not elect a DR.
D. The RP is only seen in version 2 of Sparse-Dense mode.
E. Point-to-Point links do not display DR information.
Correct Answer: BE Section: (none) Explanation
Explanation/Reference: QUESTION 151
Refer to the show interface Gi0/1 switchport command output shown in the exhibit. Which two statements are true about this interface? (Choose two.)
A. This interface is a dot1q trunk passing all configured VLANs.
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QUESTION 220
Refer to the exhibit. What statement is true about the configuration on switch CAT1?
A. The configuration overrides 802.1p priorities on packets entering ports Fa0/11 and Fa0/12 with a value of 48.
B. The configuration establishes policed DSCP on ports Fa0/11 and Fa0/12 with values ranging from 8 to
56.
C. The configuration overrides the Quality of Service value in packets entering ports Fa0/11 and Fa0/12 with a value of 45. PassGuide.com-Make You Succeed To Pass IT Exams PassGuide 642-892
D. Two IP phones with the MAC addresses of 0008.8595.d1a7 and 0007.8595.d2b7 are connected to CAT1 ports Fa0/11 and Fa0/12, respectively.
E. Security violation shutdown mode has been activated for ports Fa0/11 and Fa0/12. F. Untagged Port VLAN ID (PVID) frames will carry voice traffic on VLAN 40.
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 221
Which statement is true about the Forward Information Base (FIB) table?
A. The FIB is derived from the IP routing table and is optimized for maximum lookup throughput.
B. The FIB table is derived from the Address Resolution Protocol table, and it contains Layer 2 rewrite (MAC) information for the next hop.
C. The FIB lookup is based on the Layer 2 destination MAC address.
D. When the FIB table is full, a wildcard entry redirects traffic to the Layer 3 engine.
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 222
Refer to the exhibit. Both host stations are part of the same subnet but are in different VLANs. On the basis of the information presented in the exhibit, which statement is true about an attempt to ping from host to host?
A. A trunk port will need to be configured on the link between Sw_A and Sw_B for the ping command to be successful.
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QUESTION 239
The LDP identifier is used to identify a router during LDP session establishment. What size is the LDP identifier?
A. 8 bytes
B. 6 bytes
C. 2 bytes
D. 4 bytes
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
Explanation:
From page 33 of reference “The TDP identifier is determined in the same way as the OSPF or BGP
identifier (unless controlled by the tag tdp router-id command) — the highest IP address of all loopback
interfaces is used. That means the identified is a 32-bit ip address which should be 32/8 = 4 bytes long.
Reference: MPLS and VPN Architectures (CCIP edition)
QUESTION 240
What is true about frame mode MPLS?
A. It uses Conservative label retention.
B. It uses per-platform label allocation.
C. It uses ordered label control.
D. It used per-interface label allocation.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 241
What is a possible use of make-before-break recovery using frame mode MPLS traffic engineering?
A. It overcomes issues of convergence during both link failure and recovery.
B. It overcomes issues of convergence during link recovery.
C. It overcomes issues of convergence during link failure.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
QUESTION 242
Which of the following modes of operation would be used for cell mode MPLS?
A. Unsolicited label distribution.
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QUESTION 157
What is true about H.323 endpoint call setup?
A. Endpoints always do their own call setup.
B. Endpoints require a gatekeeper to do call setup.
C. Endpoints can either do their own setup or be assisted by a gatekeeper.
D. Endpoints require a proxy server to do call setup.
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
Explanation: A gatekeeper is an H.323 entity on the network that provides services such as address translation and network access control for H.323 terminals, gateways, and MCUs. Also, they can provide other services such as bandwidth management, accounting, and dial plans that can be centralized to provide salability. Gatekeepers are logically separated from H.323 endpoints such as terminals and
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gateways. They are optional in an H.323 network, but if a gatekeeper is present, endpoints must use the services provided.
QUESTION 158
Examine the example output hostname GW1 ! interface Ethernet 0/0 ip address 172.16.2.1 255.255.255.0 h323-gateway voip interface h323-gateway voip id GK1-zone1 .abc.com abc.com ipaddr 172.16.2.2 h323-gateway voip h323-id GW1 h323-gateway voip bind srcaddr 172.16.2.1 ! dial-peer voice 1 voip destination-pattern 12.12… … . session-target ras ! dial-peer voice 2 pots destination-pattern 2125551212 no register e164 ! end Choose the command that will restore communication with gatekeeper functionality to this device.
A. h323-gateway voip h323-id GK1
B. gateway
C. h323-gateway voip bind srcaddr 172.16.2.2
D. h323-gateway voip GW1-zone2.abc.com abc.com ipaddr 172.16.2.1
Correct Answer: B Section: (none) Explanation
QUESTION 159
What does a gateway router match to a dialed number when setting up a VoIP call?
A. IP route
B. Destination pattern
C. Call leg
D. Session target
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
Explanation:
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The router selects a dial peer for a call leg by matching the string that is defined by using the answer-address, destination-pattern, or incoming called-number command in the dial peer configuration.
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QUESTION 207
In a central services topology, which routes do client VRFs contain?
A. Routes from the client site, but not from the server site.
B. Routes from the server site, but not from the client site.
C. Routes from both the client site and the server site.
D. Only EBGP routes from either the client site or the server site.
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
Explanation: When implementing central service VPN you put ALL servers into the new VRF. This removes the use for routes between client sites. And this is what is the issue here. Of cause every client site might use an IGP like rip, ospf, isis, eigrp or ibgp for internal routing between vlans, but the vrf for a given client site will only contain routes for the server site, and not from the (other) client site(S), which makes the correct answer B.
QUESTION 208
In a managed CE router VPN implementation, which three of the following are RT configuration tasks or tasks that would need to be completed? (Choose three)
A. Configure NMS import / export route target in NMS VRF.
B. Configure NMS import / export route target in customer VRF.
C. Import routes with NMS RT into customer VRF.
D. Export routes with NMS RT into customer VRF.
E. Export loopback addresses from customer VRF with RT NMS_Client.
F. Import loopback addresses from customer VRF with RT NMS_Client.
Correct Answer: ACE Section: (none) Explanation
Explanation/Reference:
Explanation: A not B: Reference: Implementing Cisco MPLS Student Guide Volume 2 Version 2.1 Page 6-42 Configuring Route Targets: 1) Configure per-customer import-export route target in all customer VRFs 2) Configure NMS import-export route target in NMS VRF 3) Import routes with NMS RT into customer VRF 4) Export loopback addresses from customer VRF with RT NMS_Client 5) Import routes with RT NMS_Client into NMS VRF
QUESTION 209
What is the difference in implementation between a managed CE services MPLS VPN and a central servicesMPLS VPN?
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QUESTION 113
What from the list below combines voice mail, e-mail, and fax into a single application suite where a single application can be used to store and retrieve entire suite of message types?
A. PBSX Listing
B. Name Resolution IPTC
C. Call Manager 3.01
D. Cat 4000 STP v3
E. Unified messaging
Correct Answer: E Section: (none) Explanation
QUESTION 114
In a distributed call processing model, which three are located at each site? (Choose three.)
A. gatekeeper
B. voice messaging
C. media resources
D. Cisco CallManager cluster
Correct Answer: BCD Section: (none) Explanation
Explanation/Reference:
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QUESTION 115
What can be used not only to restrict dialing, but also to identify a subset of a subset of a wildcard pattern (when using the @ wildcard in the North American Dialing Plan)?
A. An IS sheet
B. A ACL
C. A Route Filter
D. A DN top
Correct Answer: C Section: (none) Explanation QUESTION 116
What does the Digit Discard Instruction of PreDot do to the pattern 9.2148134444?
A. prefix a 9 before the “-” if none is dialled
B. discard 2148134444 and send the 9 access code
C. only collect the first four digits counting right to left.
D. change it to 2148134444 before presenting it to the PSTN
Correct Answer: D Section: (none) Explanation
QUESTION 117
What is the key element in call admission control when interconnecting CallManager sitesvia the IP WAN?
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QUESTION 117
Regarding constructing a good encryption algorithm, what does creating an avalanche effect indicate?
A. Changing only a few bits of a plain-text message causes the ciphertext to be completely different.
B. Changing only a few bits of a ciphertext message causes the plain text to be completely different.
C. Altering the key length causes the plain text to be completely different.
D. Altering the key length causes the ciphertext to be completely different.
Correct Answer: A QUESTION 118
With the increasing development of network, various network attacks appear. Which statement best describes the relationships between the attack method and the result?
A. Ping Sweep – TIS1 and TIS3 Port Scan – TIS2, TIS4 and TIS5
B. Ping Sweep – TIS2 and TIS4 Port Scan – TIS1, TIS3 and TIS5
C. Ping Sweep – TIS1 and TIS5 Port Scan – TIS2, TIS3 and TIS4
D. Ping Sweep – TIS2 and TIS3 Port Scan – TIS1, TIS4 and TIS5
Correct Answer: B QUESTION 119
Stream ciphers run on which of the following?
A. Individual blocks, one at a time, with the transformations varying during the encryption
B. Individual digits, one at a time, with the transformations varying during the encryption
C. Fixed-length groups of digits called blocks
D. Fixed-length groups of bits called blocks
Correct Answer: B QUESTION 120
Which description is true about ECB mode?
A. ECB mode uses the same 64-bit key to serially encrypt each 56-bit plain-text block.
B. In ECB mode, each 56-bit plain-text block is exclusive ORed (XORed) bitwise with the previous ciphertext block.
C. ECB mode uses the same 56-bit key to serially encrypt each 64-bit plain-text block.
D. In ECB mode, each 64-bit plain-text block is exclusive ORed (XORed) bitwise with the previousciphertext block.
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