|
Question 10
Your boss at ITCertKeys.com is curios about DSL.
What does the TCP PUSH flag indicate?
A. The data in the TCP receive buffer should be sent to the application listening to this TCP
connection without waiting for further data.
B. Any data being buffered by routers between the source and destination for this connection
should be sent immediately.
C. The sender should make certain its send buffer is pushed onto the wire.
D. The session is about to end.
Answer: A
Question 11.
Your boss at ITCertKeys.com is curios about DSL.
What is true concerning interleaved versus fastpath mode in DMT DSL service?
A. Fastpath mode allows higher DSL rates.
B. Interleaved mode allocates traffic to more than one ATM PVC
C. Interleaved mode allows greater forward error correction (FEC).
D. Fastpath mode gives data precedence over voice traffic.
Answer: C
Question 12.
Your boss at ITCertKeys.com is curios about DSL.
What is the use of a VC class in IOS configuration?
A. It defines a template for virtual circuits which can be applied to a(sub)interfaces such that all
PVCs on that (sub)interface which will inherit the configuration from that template.
B. It defines various priorities for the PVCs to enable priority queuing of cells transmitted on a
sub(interface).
C. It is another name for Virtual Paths.
D. It is used to classify incoming cells on a physical interface as CBR/ABR/ and UBR traffic.
E. It defines a template for switching ATM pvcs from one interface to another.
Answer: A
Question 13.
You work as a network administrator at ITCertKeys.com.
A DSL subscriber reports that the CPE modem untrains and retrains several times each hour, but tot at regular intervals. The subscriber has a DMT modem operating on 10 kft of #26 cable (3 km of 0.4 mm cable).
The provisioned downstream rate is 2 mbps, and the provisioned upstream rate is 256 kbps. When the modem retrains, the downstream DLS may be as low as 512 kbps.
Sometimes manually retraining the modem allows it to return to a 2 mbps line rate, and sometimes manually retraining the modem does not improve the DSL line rate.
Which options would cause the intermittent train/untrain symptom as described? (Select two)
A. A telephone on the same phone line was installed without a microfilter.
When the telephone handset is take off-hook, the phone causes excessive attenuation of the
DSL frequencies and the resulting high error rate results in a retrain. Because of the degraded
signal levels while the phone is off-hook, the modem can not retrain at 2 mbps.
B. There is an interfering signal in the same cable.
When the interfering signal is present, an excessive error rate results. The modem retrains at a
lower line rate in order to recover an acceptable noise margin and error rate.
C. The noise margin was incorrectly set too high.
Reducing the noise margin will correct the symptom.
D. ADSL DMT will not permit 2 mbps downstream rates at 10 kft of #26 cable (3 km of 0.4 mm
cable). ADSL 2 megabit service will always be unreliable and intermittent on this cable length
and wire size.
E. The DMT profile is using interleaved mode. Changing to fastpath will correct the symptom.
F. The ATM QoS is UBR, and the subscriber’s traffic is yielding to VBR or CBR traffic.
Answer: A, B
Question 14.
Your boss at ITCertKeys.com is curios about DSL.
What is true concerning fastpath versus interleaved mode in DMT DLS service?
A. Fastpath mode provides lower latency (delay) than interleaved mode.
B. Fastpath mode allows higher DSL trained rates.
C. Fastpath mode allows higher effective throughput on noisy transmission lines.
D. Interleaved mode ensures that all provisional ATM PVCs on a DSL line are given equal
bandwidth.
Answer: A
Question 15.
Your boss at ITCertKeys.com is curios about DSL.
The purpose of Administrative Distance, as used by Cisco routers, is….
A. To choose between routes from different routing protocols when receiving updates for the
same network.
B. To identify which routing protocol forwarded the update.
C. To define the distance to the destination used in deciding the best path.
D. To be used only for administrative purposes
Answer: A
Question 16.
Your boss at ITCertKeys.com is curios about DSL.
What is the effect of changing DMT interleaved delay from 16 milliseconds to 2 milliseconds?
A. Fewer ATM PVCs can be provisioned on the DSL line.
B. Latency is reduced, but error correction effectiveness may also be reduced.
C. Latency remains the same, but faster error correction occurs.
D. Latency remains the same, but throughput is increased
Answer: B
Question 17.
Your boss at ITCertKeys.com is curios about DSL.
What ADSL DMT line rate requires (occupies) the most bandwidth on a telephone line?
A. 8 mbps downstream, 800 kbps upstream on 1 kft (300 meters) of cable.
B. 8 mbps downstream, 800 kbps upstream on 9 kft (2.75 km) of cable.
C. 1 mbps downstream, 256 kbps upstream on 1 kft (300 meters) of cable.
D. 512 kbps downstream, 128 kbps upstream on 17 kft (5.2 km) of cable.
Answer: A
Question 18.
You work as a network engineer at ITCertKeys.com.
A DMT DSL modem is working on a “shared line” with standard telephone service (POTS). When the subscriber picks up the telephone handset, the DSL modem untrains, then retrains at a lower DSL rate. When the telephone is not off-hook, the DSL modem will train at the subscribed rate (normal operation).
Which of the following is the probably cause of this symptom?
A. An improper DSL line rate was provisioned for shared lines.
B. A microfilter or splitter was not correctly installed between the telephone and the line.
C. The noise level on the telephone line will not allow DSL and POTS voice at the same time.
D. An incorrect DMT operating mode was provisioned in the DSLAM.
Answer: B
Question 19.
Network topology exhibit
You work as a network engineer at ITCertKeys.com.
Host ITCertKeys1 and Host ITCertKeys2 are on Ethernet LANs in different buildings. A serial line is installed between two Cisco routers using Cisco HDLC serial line encapsulation. Routers ITCertKeysA and ITCertKeysB are configured to route IP traffic. Host ITCertKeys1 sends a packet to Host ITCertKeys2. A line hit on the serial line causes an error in the packet.
When this is detected, the retransmission is sent by:
A. Host ITCertKeys1
B. Host ITCertKeys2
C. Router ITCertKeysA
D. Router ITCertKeysB
E. Protocol analyzer
Answer: A
Question 20.
Exhibit:
You work as a network engineer at ITCertKeys.com.
A DSLAM is using Reed-Solomon forward error correction on a DMT DSL line. The DSL service is using TCP/IP over ATM over DSL. A high number of upstreams RS uncorrected errors are occurring on the DSL line, as reported by the DSLAM in the status message shown in the exhibit.
What is the result of the uncorrected errors?
A. The DSL frames will be continuously retransmitted by the DSL transceivers until an error-free
frame is received.
B. If errors on the DSL line can not be corrected by the RS algorithm, the line will be automatically
taken out of service.
C. The errored data resulting from uncorrected layer-1 errors will be handled by TCP.
D. When Reed-Solomon forward error correction is used, all errors are corrected at layer 1.
The uncorrected state was present only until forward error correction algorithms corrected the
errors.
Answer: C
Question 21.
Your boss at ITCertKeys.com is curios about DSL.
In ADSL DMT systems, the highest downstream transmit power occurs at what rate/each combinations?
A. 384 kbps at 17 kft (5.1 km)
B. 8 mbps at 1 kft (305 meters)
C. 1 mbps at 9 kft (2.75 km)
D. 8 mbps at 9 kft (2.75 km)
Answer: B
Question 22.
Your boss at ITCertKeys.com is curios about DSL.
Which DSL modulation types allows line sharing (DSL and POTS voice on the same line)?
A. G.SHDSL, IDSL, and DMT
B. CAP and DMT
C. DMT and G.SHDSL
D. IDSL and SDSL
Answer: B
|
Question 1.
Which two steps are required to configure LDAP authentication? (Choose two.)
A. Configure the LDAP server type in Cisco Unified Communications Manager Administration.
B. Configure LDAP server addresses in Cisco Unified Communications Manager Administration.
C. Add a Cisco Unified Communications Manager directory user and assign administrator access
rights to the user in the LDAP directory.
D. Configure a synchronization schedule.
E. Activate Cisco DirSync service.
Answer: B, C
Question 2.
Which two statements regarding Cisco Unified Communications Manager user privileges are correct? (Choose two.)
A. A role can only be assigned to one user group.
B. An application can be referred to by only one role.
C. A resource is assigned one privilege per role.
D. A role refers to one or more applications.
E. A user can be a member of more than one user group.
Answer: C, E
Question 3.
The Ajax Corporation is designing an IP telephony network using Cisco MCS 7845 Series servers, each one capable of supporting 7500 devices.
The design must meet these requirements:
* be cost-effective
* support up to 7500 phones
* provide a minimal level of redundancy
Which configuration will meet Ajax Corporation's needs?
A. five Cisco Unified Communications Manager servers:
1 publisher
1 TFTP server
1 primary subscriber
2 backup subscribers
B. four Cisco Unified Communications Manager servers:
1 publisher
1 TFTP server
1 primary subscriber
1 backup subscriber
C. two Cisco Unified Communications Manager servers:
1 publisher and TFTP server combined
1 primary subscriber
D. three Cisco Unified Communications Manager servers:
1 publisher and TFTP server combined
1 primary subscriber
1 backup subscriber
Answer: D
Question 4.
DRAG DROP
You work as a network administrator at ITCertKeys.com. Your boss, Miss ITCertKeys, is interested in barge types. You are required to match the barge types with the appropriate functions.
Answer:
Question 5.
Network Topology Exhibit:
Exhibit:
You work as a network administrator at ITCertKeys.com. You study the exhibit carefully.
What should be entered in the Name field when configuring Cisco Unified Communications Manager to control voice port T1 1/0/0 in ITCertKeys2?
A. 10.2.120.1
B. S0/DS1@SDA0012005FEEF0
C. S0/DS1-0@ ITCertKeys2
D. ITCertKeys2
Answer: D
Question 6.
Which two features are advantages of deploying a cluster over WAN? (Choose two.)
A. scalability up to 20 sites, if there is sufficient IP WAN bandwidth
B. failover to co-resident Cisco Unified CallManager Express platforms
C. extension mobility within the cluster
D. shared line appearances
E. centralized DSP resources
Answer: C, D
Question 7.
Which three steps must be completed in order to assign a service URL to an IP phone button? (Choose three.)
A. Assign the IP phone service partition to the CSS of the phone.
B. Subscribe the phone to the service.
C. Create a softkey template that includes a service URL and assign it to the phone.
D. Create a phone button template that includes a service URL and assign it to the phone.
E. Add an IP phone service.
F. Associate a valid user profile with the phone.
Answer: B, D, E
Question 8.
A single route pattern has been added to Cisco Unified Communications Manager to use the NANP. A route filter named Local_Only has been applied to limit calls to local and service numbers only. The Local_Only route filter includes the clause:
(LOCAL-AREA-CODE EXISTS AND SERVICE EXISTS). After applying the Local_Only route filter, no calls to the PSTN can be completed.
What needs to be done to correct this issue?
A. Two separate route filters need to be applied to the route pattern, one for local calls and one
for services.
B. The route filter clause should be changed to (LOCAL-AREA-CODE DOES-NOT-EXIST AND
SERVICES DOES-NOT-EXIST) and the route pattern should be set to block calls.
C. Route filters cannot be used to allow multiple call types. Specific route patterns for local calls
and services need to be added.
D. The route pattern needs to be added twice, once with a route filter for local calls and once with
a route filter for services.
E. The route filter clause should be changed to (LOCAL-AREA-CODE EXISTS OR SERVICES
EXISTS).
Answer: D
Question 9.
What is one difference between Cisco inline power and 802.3af PoE?
A. You must determine the total number of IP phones the switch can support with 802.3af to
avoid oversubscription.
B. Cisco inline power should only be activated for those ports that require PoE to avoid
oversubscription.
C. Cisco inline power provides a variable amount of power by using CDP.
D. You must specify which set of pins the powered device is going to accept power on for
802.3af.
Answer: A
Question 10.
Which three functions does the Master Agent perform? (Choose three.)
A. controls backup and restoration of the system
B. executes backup and restore tasks
C. interfaces with the DRS agent on the Administrator PC
D. stores DRS configuration
E. acts as a backup repository
F. communicates with archive devices
Answer: A, D, F
Question 11.
A range of Meet-Me conference numbers is reserved for manager use. Which method can be used to restrict non-managers from accessing these Meet-Me numbers without limiting their ability to initiate ad hoc conferences?
A. Place the conference bridge resource in a partition that is only assigned to the CSS for the
managers' phones.
B. Place the conference bridge resource in an MRGL that is only assigned to the managers'
phones.
C. Place the Meet-Me numbers in an MRGL that is only assigned to the managers' phones.
D. Place the Meet-Me numbers in a partition that is only assigned to the CSS for the managers'
phones.
Answer: D
Copyright © 2004 CertsBraindumps.com Inc. All rights reserved.