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Q106. - (Topic 5)
A network engineer wants to allow a temporary entry for a remote user with a specific username and password so that the user can access the entire network over the Internet.
Which ACL can be used?
A. standard
B. extended
C. dynamic
D. reflexive
Answer: C
Explanation:
We can use a dynamic access list to authenticate a remote user with a specific username and password. The authentication process is done by the router or a central access server such as a TACACS+ or RADIUS server. The configuration of dynamic ACL can be read here: http://www.cisco.com/en/US/tech/tk583/tk822/technologies_tech_note09186a0080094524. shtml
Q107. - (Topic 8)
Which two statements about northbound and southbound APIs are true? (Choose two.)
A. Only southbound APIs allow program control of the network.
B. Only northbound APIs allow program control of the network.
C. Only southbound API interfaces use a Service Abstraction Layer.
D. Only northbound API interfaces use a Service Abstraction Layer.
E. Both northbound and southbound API interfaces use a Service Abstraction Layer.
F. Both northbound and southbound APIs allow program control of the network.
Answer: B,C
Q108. DRAG DROP - (Topic 4)
Drag the Frame Relay acronym on the left to match its definition on the right. (Not all acronyms are used.)
Answer:
Q109. - (Topic 5)
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: A,C,D,E
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.
Q110. - (Topic 8)
Which MTU size can cause a baby giant error?
A. 1500
B. 9216
C. 1600
D. 1518
Answer: C
Explanation: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/29805-175.html
Q111. - (Topic 3)
Which command reveals the last method used to powercycle a router?
A. show reload
B. show boot
C. show running-config
D. show version
Answer: D
Explanation:
The “show version” command can be used to show the last method to powercycle (reset) a router.
Q112. - (Topic 8)
Which feature is configured by setting a variance that is at least two times the metric?
A. equal cost load balancing
B. unequal cost load balancing
C. Path selection
D. path count
Answer: B
Q113. - (Topic 3)
What are two enhancements that OSPFv3 supports over OSPFv2? (Choose two.)
A. It requires the use of ARP.
B. It can support multiple IPv6 subnets on a single link.
C. It supports up to 2 instances of OSPFv3 over a common link.
D. It routes over links rather than over networks.
Answer: B,D
Explanation:
Here is a list of the differences between OSPFv2 and OSPFv3:
✑ They use different address families (OSPFv2 is for IPv4-only, OSPFv3 can be used for IPv6-only or both protocols
✑ OSPFv3 introduces new LSA types
✑ OSPFv3 has different packet format
✑ OSPFv3 uses different flooding scope bits (U/S2/S1)
✑ OSPFv3 adjacencies are formed over link-local IPv6 communications
✑ OSPFv3 runs per-link rather than per-subnet
✑ OSPFv3 supports multiple instances on a single link, Interfaces can have multiple IPv6 addresses
✑ OSPFv3 uses multicast addresses FF02::5 (all OSPF routers), FF02::6 (all OSPF DRs)
✑ OSPFv3 Neighbor Authentication done with IPsec (AH)
✑ OSPFv2 Router ID (RID) must be manually configured, still a 32-bit number
Reference: http://www.networkworld.com/article/2225270/cisco-subnet/ospfv3-for-ipv4-and- ipv6.html
Q114. - (Topic 4)
Refer to the exhibit.
Which statement describes DLCI 17?
A. DLCI 17 describes the ISDN circuit between R2 and R3.
B. DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C. DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.
D. DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.
Answer: C
Explanation:
DLCI-Data Link Connection Identifier Bits: The DLCI serves to identify the virtual connection so that the receiving end knows which information connection a frame belongs to. Note that this DLCI has only local significance. Frame Relay is strictly a Layer 2 protocol suite.
Q115. DRAG DROP - (Topic 7)
Drag each category on the left to its corresponding router output line on the right. Each router output line is the result of a show ip interface command. Not all categories are used.
Answer:
Explanation:
A simple way to find out which layer is having problem is to remember this rule: “the first statement is for Layer 1, the last statement is for Layer 2 and if Layer 1 is down then surely Layer 2 will be down too”, so you have to check Layer 1 before checking Layer 2. For example, from the output “Serial0/1 is up, line protocol is down” we know that it is a layer 2 problem because the first statement (Serial0/1 is up) is good while the last statement (line protocol is down) is bad. For the statement “Serial0/1 is down, line protocol is down”, both layers are down so the problem belongs to Layer 1.
There is only one special case with the statement “…. is administrator down, line protocol is down”. In this case, we know that the port is currently disabled and shut down by the administrators.
Q116. - (Topic 6)
What will be the result if the following configuration commands are implemented on a Cisco switch?
Switch(config-if)# switchport port-security
Switch(config-if)# switchport port-security mac-address sticky
A. A dynamically learned MAC address is saved in the startup-configuration file.
B. A dynamically learned MAC address is saved in the running-configuration file.
C. A dynamically learned MAC address is saved in the VLAN database.
D. Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
E. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
Answer: B
Explanation:
In the interface configuration mode, the command switchport port-security mac-address sticky enables sticky learning. When entering this command, the interface converts all the dynamic secure MAC addresses to sticky secure MAC addresses.
Q117. - (Topic 7)
What Netflow component can be applied to an interface to track IPv4 traffic?
A. flow monitor
B. flow record
C. flow sampler
D. flow exporter
Answer: A
Explanation:
Flow monitors are the Flexible NetFlow component that is applied to interfaces to perform network traffic monitoring. Flow monitors consist of a record and a cache. You add the record to the flow monitor after you create the flow monitor. The flow monitor cache is automatically created at the time the flow monitor is applied to the first interface. Flow data
is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record, which is configured for the flow monitor and stored in the flow monitor cache.
For example, the following example creates a flow monitor named FLOW-MONITOR-1 and enters Flexible NetFlow flow monitor configuration mode:
Router(config)# flow monitor FLOW-MONITOR-1 Router(config-flow-monitor)#
Q118. - (Topic 8)
Which network topology allows all traffic to flow through a central hub?
A. bus
B. star
C. mesh
D. ring
Answer: B
Q119. - (Topic 8)
Which technology allows a large number of private IP addresses to be represented by a smaller number of public IP addresses?
A. NAT
B. NTP
C. RFC 1631
D. RFC 1918
Answer: A
Q120. - (Topic 3)
Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)
A. Router(config)# router ospf 0
B. Router(config)# router ospf 1
C. Router(config)# router ospf area 0
D. Router(config-router)# network 192.168.16.0 0.0.0.255 0
E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0
F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0
Answer: B,E
Explanation:
In the router ospf command, the ranges from 1 to 65535 so o is an invalid number -> but To configure OSPF, we need a wildcard in the “network” statement, not a subnet mask. We also need to assgin an area to this process ->.