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Q1. A network engineer initiates the ip sla responder tcp-connect command in order to gather statistics for performance gauging. Which type of statistics does the engineer see? 

A. connectionless-oriented 

B. service-oriented 

C. connection-oriented 

D. application-oriented 

Answer:

Explanation: 

Configuration Examples for IP SLAs TCP Connect Operations The following example shows

how to configure a TCP Connection-oriented operation from Device B to the Telnet port (TCP port 23) of IP

Host 1 (IP address 10.0.0.1), as shown in the "TCP Connect Operation" figure in the "Information About

the IP SLAs TCP Connect Operation" section. The operation is scheduled to start immediately. In this

example, the control protocol is disabled on the source (Device B). IP SLAs uses the control protocol to

notify the IP SLAs responder to enable the target port temporarily. This action allows the responder to reply

to the TCP Connect operation. In this example, because the target is not a Cisco device and a well- known

TCP port is used, there is no need to send the control message. Device A (target device) Configuration

configure terminal ip sla responder tcp-connect ipaddress 10.0.0.1 port 23 

Reference: http://

www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15- mt-book/ sla_tcp_conn.html


Q2. Refer to the exhibit. 

Based on this FIB table, which statement is correct? 

A. There is no default gateway. 

B. The IP address of the router on FastEthernet is 209.168.201.1. 

C. The gateway of last resort is 192.168.201.1. 

D. The router will listen for all multicast traffic. 

Answer:

Explanation: 

The 0.0.0.0/0 route is the default route and is listed as the first CEF entry. Here we see the next hop for this default route lists 192.168.201.1 as the default router (gateway of last resort).


Q3. Refer to the exhibit. 

Which statement about the output of the show flow-sampler command is true? 

A. The sampler matched 10 packets, each packet randomly chosen from every group of 100 packets. 

B. The sampler matched 10 packets, one packet every 100 packets. 

C. The sampler matched 10 packets, each one randomly chosen from every 100-second interval. 

D. The sampler matched 10 packets, one packet every 100 seconds. 

Answer:

Explanation: 

The sampling mode determines the algorithm that selects a subset of traffic for NetFlow

processing. In the random sampling mode that Random Sampled NetFlow uses, incoming packets are

randomly selected so that one out of each n sequential packets is selected on average for NetFlow

processing. For example, if you set the sampling rate to 1 out of 100 packets, then NetFlow might sample

the 5th, 120th, 199th, 302nd, and so on packets. This sample configuration provides NetFlow data on 1

percent of total traffic. The n value is a parameter from 1 to 65535 packets that you can configure. Table 2

show flow-sampler Field Descriptions Field Description Sampler Name of the flow sampler id Unique ID of

the flow sampler packets matched Number of packets matched for the flow sampler mode Flow sampling

mode sampling interval is Flow sampling interval (in packets) Reference: http://www.cisco.com/c/en/us/td/

docs/ios/12_0s/feature/guide/nfstatsa.html#wp1084291


Q4. A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. Assuming that an NTP server is already set up, what is the result of the command? 

A. It enables receiving NTP broadcasts on the interface where the command was executed. 

B. It enables receiving NTP broadcasts on all interfaces globally. 

C. It enables a device to be an NTP peer to another device. 

D. It enables a device to receive NTP broadcast and unicast packets. 

Answer:

Explanation: 

The NTP service can be activated by entering any ntp command. When you use the ntp broadcast client

command, the NTP service is activated (if it has not already been activated) and the device is configured to receive NTP broadcast packets on a specified interface simultaneously.

Command Description

ntp broadcast Allows the system to receive NTP broadcast packets on an client interface.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se-3850- cr-book/

bsm-xe-3se-3850-cr-book_chapter_00.html


Q5. Which IPv6 address type is seen as the next-hop address in the output of the show ipv6 rip RIPng database command? 

A. link-local 

B. global 

C. site-local 

D. anycast 

E. multicast 

Answer:

Explanation: 


Q6. Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two.) 

A. DNS 

B. NAT 

C. port redirection 

D. stateless translation 

E. session handling 

Answer: A,B 

Explanation: 

Network Address Translation IPv6 to IPv4, or NAT64, technology facilitates communication

between IPv6-only and IPv4-only hosts and networks (whether in a transit, an access, or an edge

network). This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously

handling IPv4 address depletion. The DNS64 and NAT64 functions are completely separated, which is

essential to the superiority of NAT64 over NAT-PT. Reference: http:// www.cisco.com/c/en/us/products/

collateral/ios-nx-os-software/enterprise-ipv6- solution/white_paper_c11-676278.html


Q7. A packet capture log indicates that several router solicitation messages were sent from a local host on the IPv6 segment. What is the expected acknowledgment and its usage? 

A. Router acknowledgment messages will be forwarded upstream, where the DHCP server will allocate addresses to the local host. 

B. Routers on the IPv6 segment will respond with an advertisement that provides an external path from the local subnet, as well as certain data, such as prefix discovery. 

C. Duplicate Address Detection will determine if any other local host is using the same IPv6 address for communication with the IPv6 routers on the segment. 

D. All local host traffic will be redirected to the router with the lowest ICMPv6 signature, which is statically defined by the network administrator. 

Answer:

Explanation: 

Router Advertisements (RA) are sent in response to router solicitation messages. Router

solicitation messages, which have a value of 133 in the Type field of the ICMP packet header, are sent by

hosts at system startup so that the host can immediately autoconfigure without needing to wait for the next

scheduled RA message. Given that router solicitation messages are usually sent by hosts at system

startup (the host does not have a configured unicast address), the source address in router solicitation

messages is usually the unspecified IPv6 address (0:0:0:0:0:0:0:0). If the host has a configured unicast

address, the unicast address of the interface sending the router solicitation message is used as the source

address in the message. The destination address in router solicitation messages is the all-routers multicast

address with a scope of the link. When an RA is sent in response to a router solicitation, the destination

address in the RA message is the unicast address of the source of the router solicitation message. RA

messages typically include the following information:

One or more onlink IPv6 prefixes that nodes on the local link can use to automatically configure their IPv6

addresses

Lifetime information for each prefix included in the advertisement

Sets of flags that indicate the type of autoconfiguration (stateless or stateful) that can be completed

Default router information (whether the router sending the advertisement should be used as a default

router and, if so, the amount of time (in seconds) the router should be used as a default router)

Additional information for hosts, such as the hop limit and MTU a host should use in packets that it

originates Reference: http://www.cisco.com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/

ipv6_12_4t_book/ip6- addrg_bsc_con.html


Q8. Scenario: 

You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command. 

How many times was SPF algorithm executed on R4 for Area 1? 

A. 1 

B. 5 

C. 9 

D. 20 

E. 54 

F. 224 

Answer:

Explanation: 


Q9. Which Cisco IOS VPN technology leverages IPsec, mGRE, dynamic routing protocol, NHRP, and Cisco Express Forwarding? 

A. FlexVPN 

B. DMVPN 

C. GETVPN 

D. Cisco Easy VPN 

Answer:

Explanation: Dynamic Multipoint Virtual Private Network (DMVPN) is a dynamic tunneling form of a virtual

private network (VPN) supported on Cisco IOS-based routers and Unix-like Operating Systems based on

the standard protocols, GRE, NHRP and IPsec. This DMVPN provides the capability for creating a

dynamic-mesh VPN network without having to pre-configure (static) all possible tunnel end-point peers,

including IPsec (Internet Protocol Security) and ISAKMP (Internet Security Association and Key

Management Protocol) peers. DMVPN is initially configured to build out a hub-and-spoke network by

statically configuring the hubs (VPN headends) on the spokes, no change in the configuration on the hub is

required to accept new spokes. Using this initial hub-and-spoke network, tunnels between spokes can be

dynamically built on demand (dynamic-mesh) without additional configuration on the hubs or spokes. This

dynamic-mesh capability alleviates the need for any load on the hub to route data between the spoke

networks. DMVPN is combination of the following technologies:

Multipoint GRE (mGRE)

Next-Hop Resolution Protocol (NHRP)

Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP)

Dynamic IPsec encryption

Cisco Express Forwarding (CEF)

Reference: http://en.wikipedia.org/wiki/Dynamic_Multipoint_Virtual_Private_Network

Topic 5, Infrastructure Security 

53. Which traffic does the following configuration allow? 

ipv6 access-list cisco 

permit ipv6 host 2001:DB8:0:4::32 any eq ssh 

line vty 0 4 

ipv6 access-class cisco in 

A. all traffic to vty 0 4 from source 2001:DB8:0:4::32 

B. only ssh traffic to vty 0 4 from source all 

C. only ssh traffic to vty 0 4 from source 2001:DB8:0:4::32 

D. all traffic to vty 0 4 from source all 

Answer:

Explanation: 

Here we see that the IPv6 access list called "cisco" is being applied to incoming VTY connections to the

router. IPv6 access list has just one entry, which allows only the single IPv6 IP address of 2001:DB8:0:4::32 to connect using SSH only.


Q10. Refer to the exhibit. The command is executed while configuring a point-to-multipoint Frame Relay interface. Which type of IPv6 address is portrayed in the exhibit? 

A. link-local 

B. site-local 

C. global 

D. multicast 

Answer:

Explanation: