You are a network technician at CertKing , Inc. You are troubleshooting a connectivity problem. You
issue the ping command during a router console session. Your trainee wants to know what the ping
command use to test connectivity between the two devices.
What would your reply be?A. ICMP echo requestB. Information interrupt requestC. Timestamp replyD. Source quenchAns: A

Explanation:
The ping command sends an ICMP echo request packet to the stated destination address. The TCP/IP software
at the destination then replies to the ping echo request packet with a similar packet, called ICMP echo reply.
Reference:
CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) Page 146


Q66
Which of the following options can be negotiated using LCP during the PPP link establishment? (Select
three options.)A. Q.931B. IPCPC. multilinkD. CHAPE. callbackAns: B C D

Explanation:
The NCP phase is used for establishing and configuring different network-layer protocols. The most common
layer 3 protocol negotiated is IP. The routers exchange IP Control Protocol (IPCP) messages negotiating options
specific to the protocol.
Point-to-Point Protocol (PPP) currently supports two authentication protocols: Password Authentication
Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP). Both are specified in RFC 1334
and are supported on synchronous and asynchronous interfaces.)
(Reference: CCNA Self-Study CCNA ICND exam certification Guide
(Cisco press, ISBN 1-58720-083-X) Page 310+311 by ESMNDC.org)


Q67
Match the ISDN term on the right to the appropriate description on the left. Please note: Not all options
on the left apply.Ans:

Explanation:
o LAPD - provides the data link protocol that allows delivery of messages across that D-channel to the
local switch.
o LAPB - Protocol and is designed primarily to satisfy the signaling requirements of ISDN basic access. It
is defined by ITU-T Recommendations Q.920 and Q.921.
o TE1 - ISDN -capable four-wire cable. Understands signaling and 2B=D. Uses an S reference point.
o ITU.T.430 - Defines connectors, encoding, framing, and reference points.
o TE2 - Equipment that does not understand ISDN protocols and specifications (no ISDN awareness).
Uses an R reference point, typically an RS-232 or V.35 cable, to connect to a TA.
o NT1 - CPE equipment in North America. Connects with a U reference point (two-wire) to the telco.
Reference:
CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) Page Chapter 10


Q68
You are the network administrator at CertKing , Inc. CertKing 's network topology is shown in the
following exhibit:
You can telnet to all of the routers. An employee named Jack has moved office and finds herself on a
different floor. You need the address of Switch CertKing 5 to verify that the employee who moved office
remains in the same VLAN.
What can you do to determine the IP address of CertKing 5?A. Issue the show ip route command on Router CertKing 1.B. Issue the show cdp neighbors detail command on Router CertKing 2.C. Issue the show arp command on Router CertKing 3.D. Issue the show cdp neighbors detail command on Router CertKing 3.E. Issue the show arp command on Router CertKing 1.F. Issue the show ip route command on Router CertKing 2.Ans: D

Explanation:
To display detailed information about neighboring devices discovered using Cisco Discovery Protocol (CDP),
use the show cdp neighbors privileged EXEC command.
Detail - (Optional) Displays detailed information about a neighbor (or neighbors) including network address,
enabled protocols, hold time, and software version.


Q69
You are a network technician at CertKing , Inc. The CertKing network is shown in the following exhibit:
You must configure the address on the CertKing 2 serial interface. Which of the following commands will
you use?A. CertKing 2(config-if)# ip address 172.16.17.1 255.255.255.0B. CertKing 2(config-if)# ip address 172.16.18.255. 255.255.252.0C. CertKing 2 config-if)# ip address 172.16.17.2 255.255.255.252D. CertKing 2(config-if)# ip address 172.16.16.0 255.255.255.0Ans: B

Explanation:
CIDR Notation /22 implies that the subnet mask be 255.255.252.0.
Valid host IP Address range :
172.16.18.1 to 172.16.18.255


Q70
You are a network technician at CertKing , Inc. You received reports that users on the CertKing 2
Ethernet site cannot access the CertKing 1 network site. You issue the show running-config command.
The output form the command is shown in the following exhibit:
After reviewing the command output, what is the most likely cause of the problem?A. Link state routing protocol is missing.B. Incorrectly configured IP addressesC. IGRP is incorrectly configured.D. Frame relay is not configured.Ans: C

Explanation:
router igrp
To configure the Interior Gateway Routing Protocol (IGRP) routing process, use the router igrp global
configuration command. To shut down an IGRP routing process, use the no form of this command.
router igrp autonomous-system
autonomous-system- Autonomous system number that identifies the routes to the other IGRP routers. It is also
used to tag the routing information.