Monday, January 21, 2008

Here are the answers to your free Cisco and CompTIA questions posted Sunday, January 20!

CCENT Certification And Network+ Certification:

What layer(s) of the TCP/IP model map to the Physical, Data Link, and Network models of the OSI networking model?

Answer: The TCP/IP Network Interface layer maps to the Physical and Data Link layers of the OSI model, and the TCP/IP Internetwork layer maps to the OSI model's Network layer.


CCNA Certification:

EIGRP is considered a hybrid protocol. Briefly describe why.

Answer: EIGRP has some characteristics that are typical of distance vector protocols, and other characteristics typical of link-state protocols, which is why it's often referred to as a "hybrid" of those two protocol types.

Security+ Certification:

You're configuring a firewall, and you suddenly hear from a LOT of end users who can't get their email. Which two ports should you open in your firewall?

Answer: Two popular email protocols are POP3 (port 110) and Simple Mail Transfer Protocol (SMTP, port 25).


CCNP Certification / BSCI Exam:

Briefly describe the types of OSPF routes that can be found on a router serving as a total stub router, but not as an ASBR or ABR.

Answer: The routing table of a total stub router can contain intra-area routes (O) and a default inter-area route using the ABR as the next hop.

A typical total stub routing table:

R4#show ip route ospf
O*IA 0.0.0.0/0 [110/11] via 172.34.34.3, 00:07:26, Ethernet0


CCNP Certification / BCMSN Exam:

Identify the true statements:

A. ISL encapsulates all frames before sending them across the trunk.

B. ISL encapsulates all frames before sending them across the trunk, except those belonging to the native VLAN.

C. IEEE 802.1Q encapsulates all frames before sending them across the trunk.

D. IEEE 802.1Q encapsulates all frames before sending them across the trunk, except those belonging to the native VLAN.

E. None of these statements are true.

Answer: A. The Cisco-proprietary trunking protocol ISL does encapsulate all frames before sending them across the trunk. C and D are false because IEEE 802.1Q does not encapsulate frames at all.


CCNP Certification / ONT Exam:

In the command "fair-queue 200 128 50", what does the 200 represent?

A. The number of dynamic conversation queues.

B. The bandwidth assigned to interactive conversations.

C. The number of reservable conversation queues.

D. The number of packets that can be held in a single queue.

Answer: D. In this command, "200" is the number of packets that can be held in a single queue."128" is the number of dynamic conversation queues, and "50" is the number of reservable conversation queues.

New questions posted later today!

To your success,

Chris Bryant
CCIE #12933
http://www.thebryantadvantage.com/

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