Tài liệu Exam :640-606 Support -Version 1-2003 pdf

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E. Remote access using telnet to an auditory port


Answer: C
Explanation: Several of the commands of interest to Cisco’s Technical Assistance Center (TAC) have been
combined so that they are obtained when you enter a single privileged command show tech-support.



QUESTION NO: 7
Which CCO resource can provide World wide web-based access to the list of field replaceable units
(FRUF index) if you want to provide for spare parts?

A. Cisco NetSYS
B. CCO Bug Toolkit
C. CCO Documentation
D. CCO Configuration Tool
E. CCO Troubleshooting Engine


Answer: C
Explanation: CCO Documentation is an interactive library of technical product information. This information
includes the Cisco product catalog. These products include field replaceable units.



QUESTION NO: 8
What is the primary function of the Cisco NetSYS tools?

A. Initial network design for VLANs
B. LAN and WAN protocol imitation
C. Stress testing on SNMP network
D. Network simulation and modeling
E. Reconfiguration or redesigning documentation


Answer: D
Explanation: Netsys is an offline tool. It is a complex program that imports Cisco device configuration and
then creates a model based on the configurations. The program is used to model changes to a network before
they are actually implemented.



QUESTION NO: 9
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Which CCO resource can provide World Wide web-based access to major code upgrades and
maintenance releases of Cisco software products?

A. CCO marketplace
B. The Software center
C. CCO documentation
D. The configuration agent
E. Image authentication support center


Answer: B
Explanation: The CCO Software Center is the new version of the of the Software Library service that lets you
obtain upgrades and learn more about Cisco’s broad and growing range of software products.



QUESTION NO: 10
On the output of the Cisco IOS show controllers token command, what are the two main types of
software errors that an internal controller can count?

A. Signal loss or wire fault
B. Isolating and non-isolating
C. Single ring or multi-ring errors
D. Internal error or external error between the station and its NAUN or its downstream neighbor


Answer: B
Explanation: Token ring devices keep track of two types of soft errors: isolating soft errors and non-isolating
soft errors.



QUESTION NO: 11
Which type of protocol requires an application to request retransmission of missing or corrupt packets?

A. Host-to-host
B. Connection-oriented
C. Client/server
D. Connectionless
E. Quality-of-service oriented


Answer: D
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Explanation: Connectionless protocols do no provide request retransmission of missing or corrupt packets.
Instead they depend on the application to provide this functionality.

Incorrect Answer
Connection-oriented
A connection-orientated protocol ensures that packets are in order and manages timeout counters. The
connection-orientated protocol also requests retransmission of missing packets. The application does not have to
provide requests for missing or corrupt packets.



QUESTION NO: 12
What is the advantage of a connectionless protocol?

A. Speed
B. Security
C. Nobusiness
D. No need for upper layer connection


Answer: A
Explanation: A connectionless data transfer is efficient, is simple to implement, and has relatively low
demands for network traffic.


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QUESTION NO: 13
Click the task button.

When troubleshooting isdn BRI router problems, the Cisco IOS debug commands provide an ongoing
display that includes a captured flow of packet fields. Selecting the task button will show a table with
several Cisco IOS debug commands and a list of output information.

Drag and drop the correct information that is included in the output of each command.

Note: A command may be used more than once or not at all.

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Answer:


Explanation:
The debug bri command debugs Layer 1.
The debug isdn q921 command debugs Layer 2
The debug isdn q931 command debugs Layer 3
The debug ppp authentication command debugs password information.
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The debug ppp negotiation debugs Session layer info.
The debug dialer command display debugging information about the packets received on a dialer interface.
This includes packets that trigger the ISDN call.



QUESTION NO: 14
What is the purpose of the debug IP icmp command?

A. To send ICMP requests to all neighboring routers
B. To display a verbose explanation of ICMP ping results
C. To check if the trace process is using UDP time to live
D. To troubleshoot problems with the ICMP protocol stack
E. To check if the router is sending or receiving ICMP messages


Answer: E
Explanation: The debug ip icmp command helps you determine whether the router is sending or receiving
ICMP messages, such are redirect or network unreachable messages.



QUESTION NO: 15
When checking for ISDN events in a log or debug filter, you can configure the router to indicate how long
after the system rebooted that the events occurred. Which Cisco IOS command configures for this
feature?


Answer: service timestamps {log | debug} uptime [msec]
Explanation: The service timestamp debug uptime command logs times with the debug output by using the
system clock.



QUESTION NO: 16
Click the exhibit button.
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Cisco IOS software provides several debug commands to help you troubleshoot ISDN BRI layers2 and 3.
by selecting the exhibit button, you will see a diagram of an end-to-end ISDN BRI network.
Which two ISDN protocol-related Cisco IOS debug commands are used for troubleshooting? First enter
the command for layer 2 debug, the portion of the network illustrated as 2 in the diagram, then enter the
command for layer 3 debug, the portion of the network illustrated as 2 in the diagram.
Note: Do not abbreviate commands. Separate commands with a single space.


Answer:
debug isdn q921
debug isdn q931

Explanation: The debug isdn q921 command debugs Layer 2 and the debug isdn q931 debugs Layer 3. Make
sure you remember the space between the commands. Please note, you will NOT be provided with a list of
commands on this exam.



QUESTION NO: 17
Which Cisco IOS command provides the quickest summary indication of the three ISDN layers?

A. show isdn status
B. show tech-support
C. debug isdn-summary
D. show controller bri
E. show interface bri n


Answer: A
Explanation: The show isdn status command displays information about which ISDN switch is used and the
status of Layer 1, 2, and 3 for BRI calls.

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QUESTION NO: 18
You have initiated an action plan to resolve a network problem, but the network continues to perform
poorly. What should your next action be in order to resolve the problem?

A. Gather additional facts to see if the action plan was incomplete
B. Evaluate the underlying assumptions and problem definition for validity
C. Iterate the process and, as required, undo the changes that did not work
D. Repeat the process and modify additional variables until a solution is reached.
E. Reconsider the possibility that there are other interworking complications from other devices


Answer: C
Explanation: If your action plan does not resolve the problem, you must repeat the problem solving process. It
is important that you remove any changes that did not work. If you do not do this there is a possibility that you
will create and even bigger problem.



QUESTION NO: 19
What does a switched VLAN correspond to in the VLAN routing paradigm?

A. Bridge group
B. Router interface
C. ISL trunk identifier
D. Single-routed subnet
E. Spanning-tree branch


Answer: D
Explanation: A switched VLAN domain corresponds to a routed subnet/network number. In other words it
corresponds to a single-routed subnet.



QUESTION NO: 20
Click the exhibit button.
DLC: DLC Header

DLC:
DLC: Frame 1 arrived at 15:05:33:389, frame size is 62 (003E hex) bytes
DLC: AC: Frame priority 0, Reservation priority 0, Monitor count 0
DLC: FC: LLC frame PCF attention code: None
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DLC: FS: Addr recognized indicators: 00, Frame copied indicators: 00
DLC: Destination = Station Cisco A05903
DLC: Source = Station IBM 0AE591
DLC:

LLC: LLC Header
LLC:
LLC: DSAP = AA, SSAP = AA, command, Unnumbered frame, UI
LLC:

SNAP: SNAP Header
SNAP:
SNAP: Type = 0800 (IP)
SNAP:


This is a sample of a LAN protocol analyzer capture. What does SNAP mean in the exhibit packet?

A. Subnetwork access protocol
B. Super non-applicable protocol
C. Serial network access protocol
D. Substrata network access point
E. Second node alternative protocol


Answer: A
Explanation: SNAP stands for Subnetwork Access Protocol. In order to use a SNAP header DSAP and SAP
need to be set to AA.



QUESTION NO: 21
Which four statements about the ping ipx command in Cisco IOS software are true? (Choose Four)

A. The command works on Cisco IOS software Release 8.2 or later
B. The command was part of Cisco’s IOS software before a ping command was developed by Novell
C. The command default is to operate like Novell’s IPXPING NLM conforming to the NLSP 3.0
specification.
D. With the privileged form of the command, a higher repeat count than 5 (the default) can be specified.
E. Many of the command’s return characters are comparable to those used with a ping in the IP protocol
stack


Answer: A, B, D, E
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