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Q1. A network engineer finds that a core router has crashed without warning. In this situation, which feature can the engineer use to create a crash collection? 

A. secure copy protocol 

B. core dumps 

C. warm reloads 

D. SNMP 

E. NetFlow 

Answer: B 

Explanation: 

When a router crashes, it is sometimes useful to obtain a full copy of the memory image (called a core

dump) to identify the cause of the crash. Core dumps are generally very useful to your technical support representative.

Four basic ways exist for setting up the router to generate a core dump:

Using Trivial File Transfer Protocol (TFTP)

Using File Transfer Protocol (FTP)

Using remote copy protocol (rcp)

Using a Flash disk Reference: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/

tr19aa.html

Q2. Which three benefits does the Cisco Easy Virtual Network provide to an enterprise network? (Choose three.) 

A. simplified Layer 3 network virtualization 

B. improved shared services support 

C. enhanced management, troubleshooting, and usability 

D. reduced configuration and deployment time for dot1q trunking 

E. increased network performance and throughput 

F. decreased BGP neighbor configurations 

Answer: A,B,C 

Explanation: 

Q3. CORRECT TEXT [SIMULATION] 

Route.com is a small IT corporation that is attempting to implement the network shown in the exhibit. Currently the implementation is partially completed. OSPF has been configured on routers Chicago and NewYork. The SO/O interface on Chicago and the SO/1 interface on NewYork are in Area 0. The loopbackO interface on NewYork is in Area 1. However, they cannot ping from the serial interface of the Seattle router to the loopback interface of the NewYork router. You have been asked to complete the implementation to allow this ping. 

ROUTE.com's corporate implementation guidelines require: 

. The OSPF process ID for all routers must be 10. 

. The routing protocol for each interface must be enabled under the routing process. 

. The routing protocol must be enabled for each interface using the most specific wildcard mask possible. 

.The serial link between Seattle and Chicago must be in OSPF area 21. 

.OSPF area 21 must not receive any inter-area or external routes. 

Network Information 

Seattle 

S0/0 192.168.16.5/30 - Link between Seattle and Chicago 

Secret Password: cisco 

Chicago 

S0/0 192.168.54.9/30 - Link between Chicago and NewYork 

S0/1 192.168.16.6/30 - Link between Seattle and Chicago Secre Password: cisco 

NewYork 

S0/1 192.168.54.10/30 - Link between Chicago and NewYork 

Loopback0 172.16.189.189 

Secret Password: cisco 

Answer: Here is the solution below: 

Explanation: 

Note: In actual exam, the IP addressing, OSPF areas and process ID, and router hostnames may change, but the overall solution is the same. 

Seattle’s S0/0 IP Address is 192.168.16.5/30. So, we need to find the network address and wildcard mask of 192.168.16.5/30 in order to configure the OSPF. 

IP Address: 192.168.16.5 /30 

Subnet Mask: 255.255.255.252 

Here subtract 252 from 2565, 256-252 = 4, hence the subnets will increment by 4. 

First, find the 4th octet of the Network Address: 

The 4th octet of IP address (192.168.16.5) belongs to subnet 1 (4 to 7). 

Network Address: 192.168.16.4 

Broadcast Address: 192.168.16.7 

Lets find the wildcard mask of /30. 

Subnet Mask: (Network Bits – 1’s, Host Bits – 0’s) 

Lets find the wildcard mask of /30: 

Now we configure OSPF using process ID 10 (note the process ID may change to something else in real exam). 

Seattle>enable 

Password: cisco

Seattle#conf t 

Seattle(config)#router ospf 10 

Seattle(config-router)#network 192.168.16.4 0.0.0.3 area 21 

One of the tasks states that area 21 should not receive any external or inter-area routes (except 

the default route). 

Seattle(config-router)#area 21 stub 

Seattle(config-router)#end 

Seattle#copy run start 

Chicago Configuration: 

Chicago>enable 

Password: cisco 

Chicago#conf t 

Chicago(config)#router ospf 10 

We need to add Chicago’s S0/1 interface to Area 21 

Chicago(config-router)#network 192.168.16.4 0.0.0.3 area 21 

Again, area 21 should not receive any external or inter-area routes (except the default route). 

In order to accomplish this, we must stop LSA Type 5 if we don’t want to send external routes. And 

if we don’t want to send inter-area routes, we have to stop LSA Type 3 and Type 4. Therefore we 

want to configure area 21 as a totally stubby area. 

Chicago(config-router)#area 21 stub no-summary 

Chicago(config-router)#end 

Chicago#copy run start 

The other interface on the Chicago router is already configured correctly in this scenario, as well 

as the New York router so there is nothing that needs to be done on that router. 

Q4. The following configuration is applied to a router at a branch site: 

ipv6 dhcp pool dhcp-pool 

dns-server 2001:DB8:1:B::1 

dns-server 2001:DB8:3:307C::42 

domain-name example.com 

! 

If IPv6 is configured with default settings on all interfaces on the router, which two dynamic IPv6 addressing mechanisms could you use on end hosts to provide end-to-end connectivity? (Choose two.) 

A. EUI-64 

B. SLAAC 

C. DHCPv6 

D. BOOTP 

Answer: A,B 

Explanation: 

Q5. 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: C 

Explanation: 

Q6. 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: A 

Explanation: 

Q7. A network administrator executes the command clear ip route. Which two tables does this command clear and rebuild? (Choose two.) 

A. IP routing 

B. FIB 

C. ARP cache 

D. MAC address table 

E. Cisco Express Forwarding table 

F. topology table 

Answer: A,B 

Explanation: 

To clear one or more entries in the IP routing table, use the following commands in any mode:

Command Purpose

clear ip route {* |

Clears one or more routes from both the

{route |

unicast RIB and all the module FIBs. The

prefix/length}[next-hop route options are as follows:

interface]}

· *--All routes.

[vrf vrf-name]

Example:

· route--An individual IP route.

switch(config)# clear ip

· prefix/length--Any IP prefix.

route

10.2.2.2 · next-hop--The next-hop address · interface--The interface to reach the next-hop address.

The vrf-name can be any case-sensitive, al-phanumeric string up to 32 characters.

Reference:

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/unicast/5_0_3_N1_1/Ci

sco_n5k_layer3_ucast_cfg_rel_503_N1_1/l3_manage-routes.html

Q8. Which three problems result from application mixing of UDP and TCP streams within a network with no QoS? (Choose three.) 

A. starvation 

B. jitter 

C. latency 

D. windowing 

E. lower throughput 

Answer: A,C,E 

Explanation: 

It is a general best practice not to mix TCP-based traffic with UDP-based traffic (especially

streaming video) within a single service provider class due to the behaviors of these protocols during

periods of congestion. Specifically, TCP transmitters will throttle-back flows when drops have been

detected. Although some UDP applications have application-level windowing, flow control, and

retransmission capabilities, most UDP transmitters are completely oblivious to drops and thus never lower

transmission rates due to dropping. When TCP flows are combined with UDP flows in a single service

provider class and the class experiences congestion, then TCP flows will continually lower their rates,

potentially giving up their bandwidth to drop-oblivious UDP flows. This effect is called TCP-starvation/

UDP-dominance. This can increase latency and lower the overall throughput. TCP-starvation/UDPdominance

likely occurs if (TCP-based) mission-critical data is assigned to the same service provider class

as (UDP-based) streaming video and the class experiences sustained congestion. Even if WRED is

enabled on the service provider class, the same behavior would be observed, as WRED (for the most part)

only affects TCP-based flows. Granted, it is not always possible to separate TCP-based flows from UDPbased

flows, but it is beneficial to be aware of this behavior when making such application-mixing

decisions. Reference: http://www.cisco.com/warp/public/cc/so/neso/vpn/vpnsp/spqsd_wp.htm

Q9. Which Cisco VPN technology can use multipoint tunnel, resulting in a single GRE tunnel interface on the hub, to support multiple connections from multiple spoke devices? 

A. DMVPN 

B. GETVPN 

C. Cisco Easy VPN 

D. FlexVPN 

Answer: A 

Explanation: 

Q10. Which technology was originally developed for routers to handle fragmentation in the path between end points? 

A. PMTUD 

B. MSS 

C. windowing 

D. TCP 

E. global synchronization 

Answer: A 

Explanation: