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October 23 2009

640-802 Dumps Questions 472 to 474

QUESTION 472
Which of the following routing protocols support the use of VLSM (Variable Length Subnet Masking)? (Select
three)
A. RIPv1
B. EIGRP
C. OSPF
D. IGRP
E. RIPv2

Answer: BCE

Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
Explanation:
Static routing, OSPF, IS-IS, EIGRP, BGP, and RIP version 2 all support VLSM.
Incorrect Answers:
A, D: RIPv1 and IGRP do not support VLSM.
Reference: Sybex CCNA Study Guide edition 4, Page 123

QUESTION 473
Which of the following routing protocols do NOT support VLSM (variable length subnet masking)? (Choose all
that apply).
A. RIPv1
B. IGRP
C. EIGRP
D. OSPF
E. IS-IS
F. RIPv2

Answer: AB

Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
Explanation:
RIP version 1 and IGRP are classful IP routing protocols. They do not support variable length subnet masks.
Incorrect Answers:
C, D, E, F. Static routing, OSPF, IS-IS, EIGRP, BGP, and RIP version 2 all support VLSM.

QUESTION 474
You need to implement the use of a routing protocol that meets the following requirements:
1. Converges quickly 2. Supports VLSM, CIDR, IP, and IPX.
3. Uses minimal bandwidth for routing updates.
Which one of the following routing protocols would be the best choice?
A. RIPv1
B. RIPv2
C. IGRP
D. OSPF
E. EIGRP

Answer: E

Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
Explanation:
EIGRP would be the best choice as it provides support for VLSM and CIDR, has faster convergence times
than other protocols, is scalable, and supports IP, IPX, and AppleTalk.
EIGRP is a Cisco proprietary routing protocol, so it will not work with other vendors.
However, the requirements of the question made no mention of the use of non-Cisco routers, so it will not be
an issue in this case.
Incorrect Answers:
A, C: Both of these routing protocols do not support VLSM.
B. While RIPv2 supports VLSM, it provides no support for IPX. The IPX RIP protocol is similar in function to
RIP version 1. Both versions of RIP also consume more bandwidth than EIGRP.
D. OSPF does not support IPX.

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