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Q51. Which NetFlow component is applied to an interface and collects information about flows? 

A. flow monitor 

B. flow exporter 

C. flow sampler 

D. flow collector 

Answer:

Explanation: 

Flow monitors are the 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. Reference: http://www.cisco.com/c/en/us/td/docs/ios/fnetflow/command/

reference/fnf_book/fnf_01.html#w p1314030

Q52. Refer to the exhibit. When summarizing these routes, which route is the summarized route? 

A. OI 2001:DB8::/48 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

B. OI 2001:DB8::/24 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

C. OI 2001:DB8::/32 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

D. OI 2001:DB8::/64 [110/100] via FE80::A8BB:CCFF:FE00:6F00, Ethernet0/0 

Answer:

Explanation: 

Q53. What is a function of NPTv6? 

A. It interferes with encryption of the full IP payload. 

B. It maintains a per-node state. 

C. It is checksum-neutral. 

D. It rewrites transport layer headers. 

Answer:

Explanation: 

RFC 6296 describes a stateless IPv6-to-IPv6 Network Prefix Translation (NPTv6) function,

designed to provide address independence to the edge network. It is transport-agnostic with respect to

transports that do not checksum the IP header, such as SCTP, and to transports that use the TCP/UDP/

DCCP (Datagram Congestion Control Protocol) pseudo-header and checksum NPTv6 provides a simple

and compelling solution to meet the address-independence requirement in IPv6. The addressindependence

benefit stems directly from the translation function of the network prefix translator. To avoid

as many of the issues associated with NAPT44 as possible, NPTv6 is defined to include a two-way,

checksum-neutral, algorithmic translation function, and nothing else. Reference: http://tools.ietf.org/html/

rfc6296

Q54. PPPoE is composed of which two phases? 

A. Active Authentication Phase and PPP Session Phase 

B. Passive Discovery Phase and PPP Session Phase 

C. Active Authorization Phase and PPP Session Phase 

D. Active Discovery Phase and PPP Session Phase 

Answer:

Explanation: 

PPPoE is composed of two main phases:

Active Discovery Phase–In this phase, the PPPoE client locates a PPPoE server, called an access

concentrator. During this phase, a Session ID is assigned and the PPPoE layer is established.

PPP Session Phase–In this phase, PPP options are negotiated and authentication is performed. Once the

link setup is completed, PPPoE functions as a Layer 2 encapsulation method, allowing data to be transferred over the PPP link within PPPoE headers.

Reference: 

http://www.cisco.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn- cli/vpn-pppoe.html

Topic 3, Layer 3 Technologies 

20. Refer to the exhibit. 

Which one statement is true? 

A. Traffic from the 172.16.0.0/16 network will be blocked by the ACL. 

B. The 10.0.0.0/8 network will not be advertised by Router B because the network statement for the 10.0.0.0/8 network is missing from Router B. 

C. The 10.0.0.0/8 network will not be in the routing table on Router B. 

D. Users on the 10.0.0.0/8 network can successfully ping users on the 192.168.5.0/24 network, but users on the 192.168.5.0/24 cannot successfully ping users on the 10.0.0.0/8 network. 

E. Router B will not advertise the 10.0.0.0/8 network because it is blocked by the ACL. 

Answer:

Explanation: 

You can filter what individual routes are sent (out) or received (in) to any interface within your EIGRP

configuration.

One example is noted above. If you filter outbound, the next neighbor(s) will not know about anything

except the 172.16.0.0/16 route and therefore won't send it to anyone else downstream. If you filter inbound, YOU won't know about the route and therefore won't send it to anyone else downstream.

Q55. A network engineer is notified that several employees are experiencing network performance related issues, and bandwidth-intensive applications are identified as the root cause. In order to identify which specific type of traffic is causing this slowness, information such as the source/destination IP and Layer 4 port numbers is required. Which feature should the engineer use to gather the required information? 

A. SNMP 

B. Cisco IOS EEM 

C. NetFlow 

D. Syslog 

E. WCCP 

Answer:

Explanation: 

NetFlow Flows Key Fields

A network flow is identified as a unidirectional stream of packets between a given source and destination–

both are defined by a network-layer IP address and

transport-layer source and destination port numbers. Specifically, a flow is identified as the combination of

the following key fields:

Source IP address

Destination IP address

Source Layer 4 port number

Destination Layer 4 port number

Layer 3 protocol type

Type of service (ToS)

Input logical interface Reference: http://www.cisco.com/en/US/docs/ios-xml/ios/netflow/configuration/12-4t/

cfg-nflow- data-expt.html

Q56. Refer to the exhibit. 

Which command only announces the 1.2.3.0/24 network out of FastEthernet 0/0? 

A. distribute list 1 out 

B. distribute list 1 out FastEthernet0/0 

C. distribute list 2 out 

D. distribute list 2 out FastEthernet0/0 

Answer:

Explanation: 

Access list 2 is more specific, allowing only 1.2.3.0/24, whereas access list 1 permits all 1.0.0.0/8

networks. This question also asks us to apply this distribute list only to the outbound direction of the fast Ethernet 0/0 interface, so the correct command is "distribute list 2

out FastEthernet0/0."

Q57. Refer to the exhibit. After configuring GRE between two routers running OSPF that are connected to each other via a WAN link, a network engineer notices that the two routers cannot establish the GRE tunnel to begin the exchange of routing updates. What is the reason for this? 

A. Either a firewall between the two routers or an ACL on the router is blocking IP protocol number 47. 

B. Either a firewall between the two routers or an ACL on the router is blocking UDP 57. 

C. Either a firewall between the two routers or an ACL on the router is blocking TCP 47. 

D. Either a firewall between the two routers or an ACL on the router is blocking IP protocol number 57. 

Answer:

Explanation: 

Q58. Refer to the exhibit. The network setup is running the RIP routing protocol. Which two events will occur following link failure between R2 and R3? (Choose two.) 

A. R2 will advertise network 192.168.2.0/27 with a hop count of 16 to R1. 

B. R2 will not send any advertisements and will remove route 192.168.2.0/27 from its routing table. 

C. R1 will reply to R2 with the advertisement for network 192.168.2.0/27 with a hop count of 16. 

D. After communication fails and after the hold-down timer expires, R1 will remove the 192.168.2.0/27 route from its routing table. 

E. R3 will not accept any further updates from R2, due to the split-horizon loop prevention mechanism. 

Answer: A,C 

Explanation: 

Q59. What is the purpose of the autonomous-system {autonomous-system-number} command? 

A. It sets the EIGRP autonomous system number in a VRF. 

B. It sets the BGP autonomous system number in a VRF. 

C. It sets the global EIGRP autonomous system number. 

D. It sets the global BGP autonomous system number. 

Answer:

Explanation: 

To configure the autonomous-system number for an Enhanced Interior Gateway Routing

Protocol (EIGRP) routing process to run within a VPN routing and forwarding (VRF) instance, use the

autonomous-system command in address-family configuration mode. To remove the autonomous-system

for an EIGRP routing process from within a VPN VRF instance, use the no form of this command.

autonomous-system autonomous-system-number no autonomous-system autonomous-system-number

Reference: http://www.cisco.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/

ire_a1.htm l#wp1062796

Q60. The enterprise network WAN link has been receiving several denial of service attacks from both IPv4 and IPv6 sources. Which three elements can you use to identify an IPv6 packet via its header, in order to filter future attacks? (Choose three.) 

A. Traffic Class 

B. Source address 

C. Flow Label 

D. Hop Limit 

E. Destination Address 

F. Fragment Offset 

Answer: A,C,D 

Explanation: 

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