Which two statements about using leased lines for your WAN infrastructure are true? (Choose two.)
A.
Leased lines provide inexpensive WAN access.
B.
Leased lines with sufficient bandwidth can avoid latency between endpoints.
C.
Leased lines require little installation and maintenance expertise.
D.
Leased lines provide highly flexible bandwidth scaling.
E.
Multiple leased lines can share a router interface.
F.
Leased lines support up to T1 link speeds.
Answer should be B & C
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Most relevant answers are applicable.
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The advantages of leased lines include:
+ Simplicity: Point-to-point communication links require minimal expertise to install and maintain.<==== So ANswer: Leased lines require little installation and maintenance expertise. IS CORRECT !!!
+ Quality: Point-to-point communication links usually offer high service quality, if they have adequate bandwidth.
The dedicated capacity removes latency or jitter between the endpoints. <====== So Answer: Leased lines with sufficient bandwidth can avoid latency between endpoints. IS CORRECT!!!!!
+ Availability: Constant availability is essential for some applications, such as e-commerce. Point-to-point communication links provide permanent, dedicated capacity, which is required for VoIP or Video over IP.
The disadvantages of leased lines include:
+ Cost: Point-to-point links are generally the most expensive type of WAN access. The cost of leased line solutions can become significant when they are used to connect many sites over increasing distances. In addition, each endpoint requires an interface on the router, which increases equipment costs.
+ Limited flexibility: WAN traffic is often variable, and leased lines have a fixed capacity, so that the bandwidth of the line seldom matches the need exactly <======== therefore answer D IS NOT CORRECT).
Any change to the leased line generally requires a site visit by ISP personnel to adjust capacity.
(Reference: Connecting Networks Companion Guide Book published by Cisco Networking Academy – Page 54)
FIX IT!!!!!!
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QUESTION 301
Syslog was configured with a level 3 trap. Which 4 types of logs would be generated (choose four)
A. Emergencies
B. Alerts
C. Critical
D. Errors
E. Warnings
Answer: ABCD
Explanation:
The Message Logging is divided into 8 levels as listed below:
Level Keyword Description
0 emergencies System is unusable
1 alerts Immediate action is needed
2 critical Critical conditions exist
3 errors Error conditions exist
4 warnings Warning conditions exist
5 notification Normal, but significant, conditions exist 6 informational Informational messages
7 debugging Debugging messages
The highest level is level 0 (emergencies). The lowest level is level 7. If you specify a level with the “logging console level” command, that level and all the higher levels will be displayed. For example, by using the “logging console warnings” command, all the logging of emergencies, alerts, critical, errors, warnings will be displayed.
QUESTION 302
What are the benefit of using Netflow? (Choose three.)
A. Network, Application & User Monitoring
B. Network Planning
C. Security Analysis
D. Accounting/Billing
Answer: ACD
QUESTION 303
Which protocol can cause overload on a CPU of a managed device?
A. Netflow
B. WCCP
C. IP SLA
D. SNMP
Answer: D
Explanation:
Sometimes, messages like this might appear in the router console:
%SNMP-3-CPUHOG: Processing [chars] of [chars]
They mean that the SNMP agent on the device has taken too much time to process a request.
You can determine the cause of high CPU use in a router by using the output of the show process cpu command.
Note: A managed device is a part of the network that requires some form of monitoring and management (routers, switches, servers, workstations, printers…).
QUESTION 304
What are the three things that the Netflow uses to consider the traffic to be in a same flow?
A. IP address
B. Interface name
C. Port numbers
D. L3 protocol type
E. MAC address
Answer: ACD
Explanation:
What is an IP Flow?
Each packet that is forwarded within a router or switch is examined for a set of IP packet attributes. These attributes are the IP packet identity or fingerprint of the packet and determine if the packet is unique or similar to other packets. Traditionally, an IP Flow is based on a set of 5 and up to 7 IP packet attributes.
IP Packet attributes used by NetFlow:
+ IP source address
+ IP destination address
+ Source port
+ Destination port
+ Layer 3 protocol type
+ Class of Service
+ Router or switch interface
QUESTION 305
What is the alert message generated by SNMP agents called ?
A. TRAP
B. INFORM
C. GET
D. SET
Answer: AB
Explanation:
A TRAP is a SNMP message sent from one application to another (which is typically on a remote host). Their purpose is merely to notify the other application that something has happened, has been noticed, etc. The big problem with TRAPs is that they’re unacknowledged so you don’t actually know if the remote application received your oh-so-important message to it. SNMPv2 PDUs fixed this by introducing the notion of an INFORM, which is nothing more than an acknowledged TRAP.
QUESTION 306
Which three features are added in SNMPv3 over SNMPv2?
A. Message Integrity
B. Compression
C. Authentication
D. Encryption
E. Error Detection
Answer: ACD
QUESTION 307
In a GLBP network, who is responsible for the arp request?
A. AVF
B. AVG
C. Active Router
D. Standby Router
Answer: B
QUESTION 308
What levels will be trapped if the administrator executes the command router(config)# logging trap 4 (Choose four) ?
A. Emergency
B. Notice
C. Alert
D. Error
E. Warning
Answer: ACDE
Explanation:
The Message Logging is divided into 8 levels as listed below:
Level Keyword Description
0 emergencies System is unusable
1 alerts Immediate action is needed
2 critical Critical conditions exist
3 errors Error conditions exist
4 warnings Warning conditions exist
5 notification Normal, but significant, conditions exist 6 informational Informational messages
7 debugging Debugging messages
If you specify a level with the “logging trap level” command, that level and all the higher levels will be logged.
For example, by using the “logging trap 4 command, all the logging of emergencies, alerts, critical, errors, warnings will be logged.
QUESTION 309
Hotspot Question
Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links.
You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.
An OSPF neighbor adjacency is not formed between R3 in the main office and R4 in the Branchl office. What is causing the problem?
A. There is an area ID mismatch.
B. There is a Layer 2 issue; an encapsulation mismatch on serial links.
C. There is an OSPF hello and dead interval mismatch.
D. The R3 router ID is configured on R4.
Answer: A
Explanation:
A show running-config command on R3 and R4 shows that R4 is incorrectly configured for area 2:
QUESTION 310
……
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