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1.What is the best definition of the use of “Area 0″ in OSPF?
A: Area 0 is used for administrative reasons, and is restricted from user definition.
B: Area 0 is defined as the backbone, designed to be at the center of all routing updates, and controls the dissemination of updates between areas.
C: Area 0 is used to authenticate messages received from other routers in the same area.
D: Area 0 is used for forwarding all routing updates received within the same Autonomous System from directly connected areas only.
E: Area 0 allows for routing updates to be forwarded between different Autonomous Systems.
Correct Answers:?? B
2.An ISDN T1 PRI is composed of:
A: 24 B channels and one D channel
B: 24 D channels and one B channel
C: 23 D channels and one B channel
D: 23 B channels and one D channel
E: 25 B channels
Correct Answers:?? D

Associated with CCIE Service Provider Written Exam for exam 350-023,The written exam is a two-hour, multiple choice test with 100 questions covering areas such as Layer 2 networking, IP protocols, MPLS, VPN, security, quality of service and high availability technologies. The 350-023 exam is closed book and no outside reference materials are allowed.

1.The IMA Control Protocol (ICP) cells:
A:Are only sent over the major IMA link, which is the first Link added to the IMA group
B:Allows the receiver to adjust to differential link delays
C:Uses RM cells
D:Defines the boundary of IMA frames
E:Uses OAM cells
Correct Answers:?? B, D, E
2.With VAD set, a utilization rate of 40%, and 16K ADPCM set, how many voice channels can be routed on a T1 trunk?
A: 24
B: 48
C: 96
D: More than 200
Correct Answers:?? D
3.What does NOT contribute to lowered throughput in practical IP over ATM networks?
A: ILMI overhead
B: SAR delay
C: Cell tax
D: Cell padding
Correct Answers:?? A
4.What IE is not mandatory in a Q.931 Service msg?
A: Bearer capability
B: Channel ID
C: Message Type
D: Change Status
E: Call Reference
Correct Answers:?? A
5.What is Fast EtherChannel?
A: A feature to bundle multiple Ethernet point-to-point links quickly into one logical high speed link
B: A feature to bundle multiple Fast-Ethernet point-to-point links into one logical high speed link
C: Another name for full-duplex Fast Ethernet
D: Another name for Gigabit Ethernet
E: None of the above
Correct Answers:?? B
6.Which are valid combinations?
A: ESF and B8ZS
B: SF (D4) and B8ZS
C: ESF and AMI
D: All of the above

Correct Answers:?? D

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9.The two label distribution protocols that provide support for MPLS traffic engineering are:
A: RSVP and OSPF
B: CR-LDP and IBGP
C: RSVP and CR-LDP
D: LPS and LDS
Correct Answers:?? C
10.In order to avoid loops when sending routing updates, what is the correct technique to prevent a network from being forwarded on the same interface it is learned?
A: Poison Reverse
B: The use of access-lists used with distribute-list
C: Split Horizon
D: This is not a problem, since this cannot happen.

Correct Answers:?? C

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