Saturday, June 07, 2008

Welcome to the weekend! It's Saturday, June 7, 2008, and here are the answers to yesterday's Cisco certification exam training questions.

Network+ questions return on Monday, and Microsoft Server 2008 certification questions make their debut in August!

CCENT Certification:

Identify the true statement(s) regarding Frame Relay mapping.

A. Always map the local DLCI to the local IP address.

B. Always map the local DLCI to the remote IP address.

C. Always map the remote DLCI to the local IP address.

D. Always map the remote DLCI to the remote IP address.

E. To allow dynamic mapping, Inverse ARP must be enabled.

F. To allow dynamic mapping, Inverse ARP must be disabled.

Answers: B, E. The frame map statement should reference a local DLCI and a remote IP address. For example, to map the local DLCI 122 to the remote IP address, we'd use this command on the Serial interface used to reach that address:

R1(config-if)#frame map ip 122 broadcast

Inverse ARP does enable dynamic mapping, but most Frame networks use static routing. It can be a pain to mix static and dynamic mappings, especially when a router is reloaded, so most network admins disable dynamic mapping with this command:

R1(config-if)#no frame-relay inverse-arp

CCNA Exam:

What summary route can be used to advertise the following four routes? /16 /16 /16 /16

Answer:, or /14 in prefix notation.

CCNP Certification / BSCI Exam:

You are examining an IPv6 address and notice two consecutive colons. What does this represent, if anything?

Answer: Those two colons represent a string of zeros. This is referred to as zero compression, but can only be done once in a single IPv6 address. Leading zero compression, though, can be done as many times as is appropriate in an IPv6 address.

Original format: 1234:1234:0000:0000:0000:0000:3456:3434

Using zero compression: 1234:1234::3456:3434

CCNP Certification / BCMSN Exam:

How many bytes are added to a frame as a result of ISL encapsulation?

Answer: The header is 26 bytes, the trailer containing the CRC value is 4 bytes, for a total of 30 bytes.

CCNP Certification / ISCW Exam:

What command disables ICMP redirects?

Answer: no ip redirects.

CCNP Certification / ONT Exam:

What number and name are given to the highest possible CoS value?

Answer: The highest possible CoS value is 7 (111 in binary), known commonly as Network.

New questions here on the blog later today, plus two bonus sets of questions - one for CCNA and CCENT candidates, one for Network+ candidates - will be posted over the weekend, and I'll link to them from the blog!

To your success,

Chris Bryant
CCIE #12933

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