100-105 | Refined CCENT 100-105 examcollection


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New Cisco 100-105 Exam Dumps Collection (Question 1 - Question 10)

New Questions 1

What is the effect of using the service password-encryption command?

A. Only the enable password will be encrypted.

B. Only the enable secret password will be encrypted.

C. Only passwords configured after the command has been entered will be encrypted.

D. It will encrypt the secret password and remove the enable secret password from the configuration.

E. It will encrypt all current and future passwords.

Answer: E

Explanation:

Encryption further adds a level of security to the system as anyone having access to the database of passwords cannot reverse the process of encryption to know the actual passwords which isnu2021t the case if the passwords are stored simply.

New Questions 2

Refer to the exhibit.

A network administrator is troubleshooting a connectivity problem on the serial interfaces. The output from the show interfaces command on both routers shows that the serial interface is up, line protocol is down. Given the partial output for the show running-config in the exhibit, what is the most likely cause of this problem?

A. The serial cable is bad.

B. The MTU is incorrectly configured.

C. The Layer 2 framing is misconfigured.

D. The IP addresses are not in the same subnet.

Answer: C

Explanation:

Here we see that Rtr3 is configured to use PPP encapsulation, but Rtr1 has not been configured for any kind of encapsulation. The default on Cisco router serial interfaces is HDLC, not PPP, so there is an encapsulation mismatch.

New Questions 3

What are two benefits of using a single OSPF area network design? (Choose two.)

A. It is less CPU intensive for routers in the single area.

B. It reduces the types of LSAs that are generated.

C. It removes the need for virtual links.

D. It increases LSA response times.

E. It reduces the number of required OSPF neighbor adjacencies.

Answer: B,C

Explanation:

OSPF uses a LSDB (link state database) and fills this with LSAs (link state advertisement). The link types are as follows:

u2711 LSA Type 1: Router LSA

u2711 LSA Type 2: Network LSA

u2711 LSA Type 3: Summary LSA

u2711 LSA Type 4: Summary ASBR LSA

u2711 LSA Type 5: Autonomous system external LSA

u2711 LSA Type 6: Multicast OSPF LSA

u2711 LSA Type 7: Not-so-stubby area LSA

u2711 LSA Type 8: External attribute LSA for BGP

If all routers are in the same area, then many of these LSA types (Summary ASBR LSA, external LSA, etc) will not be used and will not be generated by any router.

All areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). In some cases, where this is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can also use virtual links to connect two parts of a partitioned backbone through a non- backbone area. The area through which you configure the virtual link, known as a transit area, must have full routing information. The transit area cannot be a stub area. Virtual links are not ideal and should really only be used for temporary network solutions or migrations. However, if all locations are in a single OSPF area this is not needed.

New Questions 4

How many bits are contained in each field of an IPv6 address?

A. 24

B. 4

C. 8

D. 16

Answer: D

Explanation:

One of the key advantages IPv6 brings is the exponentially larger address space. The following will outline the basic address architecture of IPv6.

128-bit-long addresses Represented in hexadecimal format:

Uses CIDR principles: prefix/prefix length x:x:x:x:x:x:x:x, where x is a 16-bit hex field The last 64 bits are used for the interface ID

http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd 8026003d.pdf

New Questions 5

Refer to the exhibit.

Which command would you use to configure a static route on Router1 to network 192.168.202.0/24 with a nondefault administrative distance?

A. router1(config)#ip route 1 192.168.201.1 255.255.255.0 192.168.201.2

B. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 1

C. router1(config)#ip route 5 192.168.202.0 255.255.255.0 192.168.201.2

D. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 5

Answer: D

Explanation:

The default AD for a static route is 1. To change this, configure a different value to be used as the AD at the very end of the u201cip routeu201d statement.

New Questions 6

What does administrative distance refer to?

A. the cost of a link between two neighboring routers

B. the advertised cost to reach a network

C. the cost to reach a network that is administratively set

D. a measure of the trustworthiness of a routing information source

Answer: D

Reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml

Administrative distance is the feature that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the help of an administrative distance value.

Administrative distance is the first criterion that a router uses to determine which routing protocol to use if two protocols provide route information for the same destination. Administrative distance is a measure of the trustworthiness of the source of the routing information. The smaller the administrative distance value, the more reliable the protocol.

New Questions 7

Refer to the exhibit.

The network administrator made the entries that are shown and then saved the configuration. From a console connection, what password or password sequence is required for the administrator to access privileged mode on Router1?

A. cisco

B. sanfran

C. sanjose

D. either cisco or sanfran

E. either cisco or sanjose

F. sanjose and sanfran

Answer: B

Explanation:

The enable secret password takes precedence over the enable password, so sanfran will be used.

New Questions 8

Refer to the exhibit.

A technician pastes the configurations in the exhibit into the two new routers shown. Otherwise, the routers are configured with their default configurations.

A ping from Host1 to Host 2 fails, but the technician is able to ping the S0/0 interface of R2 from Host 1. The configurations of the hosts have been verified as correct. What could be the cause of the problem?

A. The serial cable on R1 needs to be replaced.

B. The interfaces on R2 are not configured properly

C. R1 has no route to the 192.168.1.128 network.

D. The IP addressing scheme has overlapping subnetworks.

E. The ip subnet-zero command must be configured on both routers.

Answer: C

Explanation:

Without a static route pointing to the host 2 network the router R1 is unaware of the path to take to reach that network and reply traffic cannot be sent.

New Questions 9

OSPF is configured using default classful addressing. With all routers and interfaces operational, how many networks will be in the routing table of R1 that are indicated to be learned by OSPF?

A. 2

B. 3

C. 4

D. 5

E. 6

F. 7

Answer: C

Explanation:

Although OSPF is configured using default classful addressing but OSPF is a link-state routing protocol so it will always send the subnet mask of each network in their advertised routes. Therefore R1 will learn the the complete subnets. Four networks list below will be in the routing table of R1:+ 172.16.2.64/30+ 172.16.2.228/30+ 172.16.2.232/30+ 172.16.3.0/24

Note: Other networks will be learned as u201cDirectly connectedu201d networks (marked with letter u201cCu201d)

New Questions 10

After the network has converged, what type of messaging, if any, occurs between R3 and R4?

A. No messages are exchanged

B. Hellos are sent every 10 seconds.

C. The full database from each router is sent every 30 seconds.

D. The routing table from each router is sent every 60 seconds.

Answer: B

Explanation:

HELLO messages are used to maintain adjacent neighbors so even when the network is converged, hellos are still exchanged. On broadcast and point-to-point links, the default is 10 seconds, on NBMA the default is 30 seconds.

Although OSPF is a link-state protocol the full database from each router is sent every 30 minutes (not seconds) therefore, C and D are not correct.

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