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Q151.  - (Topic 8)

Why is the Branch2 network 10.1 0.20.0/24 unable to communicate with the Server farm1 network 10.1 0.10.0/24 over the GRE tunnel?

A. The GRE tunnel destination is not configured on the R2 router.

B. The GRE tunnel destination is not configured on the Branch2 router.

C. The static route points to the tunnel0 interface that is misconfigured on the Branch2 router.

D. The static route points to the tunnel0 interface that is misconfigured on the R2 router.

Answer: C


Q152.  - (Topic 5)

Which two of these statements are true of IPv6 address representation? (Choose two.)

A. There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast.

B. A single interface may be assigned multiple IPv6 addresses of any type.

C. Every IPv6 interface contains at least one loopback address.

D. The first 64 bits represent the dynamically created interface ID.

E. Leading zeros in an IPv6 16 bit hexadecimal field are mandatory.

Answer: B,C

Explanation:

✑ A single interface may be assigned multiple addresses of any type (unicast, anycast, multicast).

✑ Every IPv6-enabled interface must contain at least one loopback and one link-local

address.

✑ Optionally, every interface can have multiple unique local and global addresses.

Reference: IPv6 Addressing at a Glance – Cisco PDF


Q153.  - (Topic 5)

Which three statements about Syslog utilization are true? (Choose three.)

A. Utilizing Syslog improves network performance.

B. The Syslog server automatically notifies the network administrator of network problems.

C. A Syslog server provides the storage space necessary to store log files without using router disk space.

D. There are more Syslog messages available within Cisco IOS than there are comparable SNMP trap messages.

E. Enabling Syslog on a router automatically enables NTP for accurate time stamping.

F. A Syslog server helps in aggregation of logs and alerts.

Answer: C,D,F

Explanation:

The Syslog sender sends a small (less than 1KB) text message to the Syslog receiver. The Syslog receiver is commonly called "syslogd," "Syslog daemon," or "Syslog server." Syslog messages can be sent via UDP (port 514) and/or TCP (typically, port 5000). While there are some exceptions, such as SSL wrappers, this data is typically sent in clear text over the network. A Syslog server provides the storage space necessary to store log files without using router disk space.

In general, there are significantly more Syslog messages available within IOS as compared to SNMP Trap messages. For example, a Cisco Catalyst 6500 switch running Cisco IOS Software Release 12.2(18)SXF contains about 90 SNMP trap notification messages, but has more than 6000 Syslog event messages.

System logging is a method of collecting messages from devices to a server running a syslog daemon. Logging to a central syslog server helps in aggregation of logs and alerts. Cisco devices can send their log messages to a UNIX-style syslog service. A syslog service accepts messages and stores them in files, or prints them according to a simple configuration file.

Reference: http://www.cisco.com/c/en/us/products/collateral/services/high-availability/white_paper_c11-557812.html


Q154.  - (Topic 8)

Which configuration can you apply to enable encapsulation on a subinterface?

A. interface FastEthernet 0/0 encapsulation dot1Q 30

ip address 10.1.1.30 255.255.255.0

B. interface FastEthernet 0/0.30

ip address 10.1.1.30 255.255.255.0

C. interface FastEthernet 0/0.30 description subinterface vlan 30

D. interface FastEthernet 0/0.30 encapsulation dot1Q 30

ip address 10.1.1.30 255.255.255.0

Answer: D


Q155. CORRECT TEXT - (Topic 7)

The following have already been configured on the router:

✑ The basic router configuration

✑ The appropriate interfaces have been configured for NAT inside and NAT outside.

✑ The appropriate static routes have also been configured (since the company will be a stub network, no routing protocol will be required)

✑ All passwords have been temporarily set to “cisco”.

The task is to complete the NAT configuration using all IP addresses assigned by the ISP to provide Internet access for the hosts in the Weaver LAN. Functionality can be tested by clicking on the host provided for testing.

Configuration information:

router name – Weaver

inside global addresses – 198.18.184.105 - 198.18.184.110/29 inside local addresses - 192.168.100.17 – 192.168.100.30/28 number of inside hosts – 14

A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30.

Answer: 

The company has 14 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29. Therefore we have to use NAT overload (or PAT)

Double click on the Weaver router to open it

Router>enable Router#configure terminal

First you should change the router's name to Weaver

Router(config)#hostname Weaver

Create a NAT pool of global addresses to be allocated with their netmask. Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248

Create a standard access control list that permits the addresses that are to be translated.

Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15

Establish dynamic source translation, specifying the access list that was defined in the prior step.

Weaver(config)#ip nat inside source list 1 pool mypool overload

This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110). Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports.

The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements.

This is how to configure the NAT inside and NAT outside, just for your understanding:

Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end

Finally, we should save all your work with the following command:

Weaver#copy running-config startup-config

Check your configuration by going to "Host for testing" and type:

C :>ping 192.0.2.114

The ping should work well and you will be replied from 192.0.2.114


Q156.  - (Topic 8)

What is one requirement for interfaces to run IPv6?

A. An IPv6 address must be configured on the interface.

B. An IPv4 address must be configured.

C. Stateless autoconfiguration must be enabled after enabling IPv6 on the interface.

D. IPv6 must be enabled with the ipv6 enable command in global configuration mode.

Answer: A

Explanation: To use IPv6 on your router, you must, at a minimum, enable the protocol and assign IPv6 addresses to your interfaces.


Q157.  - (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


Q158.  - (Topic 5)

What are three components that comprise the SNMP framework? (Choose three.)

A. MIB

B. agent

C. set

D. AES

E. supervisor

F. manager

Answer: A,B,F

Explanation:

The SNMP framework consists of three parts:

•An SNMP manager — The system used to control and monitor the activities of network devices using SNMP.

•An SNMP agent — The software component within the managed device that maintains the data for the device and reports these data, as needed, to managing systems. Cisco Nexus 1000V supports the agent and MIB. To enable the SNMP agent, you must define the relationship between the manager and the agent.

•A managed information base (MIB) — The collection of managed objects on the SNMP agent.

SNMP is defined in RFCs 3411 to 3418.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/s ystem_management/configuration/guide/n1000v_system/n1000v_system_10snmp.html


Q159.  - (Topic 8)

Which address class includes network 191.168.0.1/27?

A. Class C

B. Class B

C. Class D

D. Class A

Answer: B


Q160.  - (Topic 6)

How does using the service password-encryption command on a router provide additional security?

A. by encrypting all passwords passing through the router

B. by encrypting passwords in the plain text configuration file

C. by requiring entry of encrypted passwords for access to the device

D. by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges

E. by automatically suggesting encrypted passwords for use in configuring the router

Answer: B

Explanation:

By using this command, all the (current and future) passwords are encrypted. This command is primarily useful for keeping unauthorized individuals from viewing your password in your configuration file