[Free] 2017(July) EnsurePass Examcollection Cisco 200-125 Dumps with VCE and PDF 121-130

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CCNA Cisco Certified Network Associate CCNA (v3.0)

Question No: 121 DRAG DROP – (Topic 3)

Drag the Cisco default administrative distance to the appropriate routing protocol or route. (Not all options are used.)

image

Answer:

image

Question No: 122 – (Topic 3)

Refer to the exhibit.

image

The company uses EIGRP as the routing protocol. What path will packets take from a host on the 192.168.10.192/26 network to a host on the LAN attached to router R1?

  1. The path of the packets will be R3 to R2 to R1.

  2. The path of the packets will be R3 to R1 to R2.

  3. The path of the packets will be both R3 to R2 to R1 AND R3 to R1.

  4. The path of the packets will be R3 to R1.

Answer: D Explanation:

Host on the LAN attached to router R1 belongs to 192.168.10.64/26 subnet. From the output of the routing table of R3 we learn this network can be reach via 192.168.10.9, which is an IP address in 192.168.10.8/30 network (the network between R1 amp; R3) -gt; packets destined for 192.168.10.64 will be routed from R3 -gt; R1 -gt; LAN on R1.

Question No: 123 – (Topic 3)

A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network?

  1. a directly connected interface with an address of 192.168.10.254/24

  2. a static route to network 192.168.10.0/24

  3. a RIP update for network 192.168.10.0/24

  4. an OSPF update for network 192.168.0.0/16

  5. a default route with a next hop address of 192.168.10.1

  6. a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop

Answer: A Explanation:

When there is more than one way to reach a destination, it will choose the best one based on a couple of things. First, it will choose the route that has the longest match; meaning the most specific route. So, in this case the /24 routes will be chosen over the /16 routes. Next, from all the /24 routes it will choose the one with the lowest administrative distance. Directly connected routes have an AD of 1 so this will be the route chosen.

Question No: 124 – (Topic 3)

Refer to the exhibit.

image

Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1?

  1. The router will forward packets from R3 to R2 to R1.

  2. The router will forward packets from R3 to R1 to R2.

  3. The router will forward packets from R3 to R2 to R1 AND from R3 to R1.

  4. The router will forward packets from R3 to R1.

Answer: C Explanation:

From the routing table we learn that network 192.168.10.0/30 is learned via 2 equal-cost paths (192.168.10.9 amp;192.168.10.5) -gt; traffic to this network will be load-balancing.

Question No: 125 – (Topic 3)

Which command is used to display the collection of OSPF link states?

  1. show ip ospf link-state

  2. show ip ospf lsa database

  3. show ip ospf neighbors

  4. show ip ospf database

Answer: D Explanation:

The 鈥渟how ip ospf database鈥?command displays the link states. Here is an example: Here is the lsa database on R2.

R2#show ip ospf database

OSPF Router with ID (2.2.2.2) (Process ID 1) Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 2.2.2.2 2.2.2.2 793 0x80000003 0x004F85 2

10.4.4.4 10.4.4.4 776 0x80000004 0x005643 1

111.111.111.111 111.111.111.111 755 0x80000005 0x0059CA 2

133.133.133.133 133.133.133.133 775 0x80000005 0x00B5B1 2

Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

10.1.1.1 111.111.111.111 794 0x80000001 0x001E8B

10.2.2.3 133.133.133.133 812 0x80000001 0x004BA9

10.4.4.1 111.111.111.111 755 0x80000001 0x007F16

10.4.4.3 133.133.133.133 775 0x80000001 0x00C31F

Question No: 126 – (Topic 3)

Which statements describe the routing protocol OSPF? (Choose three.)

  1. It supports VLSM.

  2. It is used to route between autonomous systems.

  3. It confines network instability to one area of the network.

  4. It increases routing overhead on the network.

  5. It allows extensive control of routing updates.

  6. It is simpler to configure than RIP v2.

Answer: A,C,E Explanation:

The OSPF protocol is based on link-state technology, which is a departure from the Bellman-Ford vector based algorithms used in traditional Internet routing protocols such as RIP. OSPF has introduced new concepts such as authentication of routing updates, Variable Length Subnet Masks (VLSM), route summarization, and so forth.

OSPF uses flooding to exchange link-state updates between routers. Any change in routing information is flooded to all routers in the network. Areas are introduced to put a boundary on the explosion of link-state updates. Flooding and calculation of the Dijkstra algorithm on a router is limited to changes within an area.

Question No: 127 – (Topic 3)

Which type of EIGRP route entry describes a feasible successor?

  1. a backup route, stored in the routing table

  2. a primary route, stored in the routing table

  3. a backup route, stored in the topology table

  4. a primary route, stored in the topology table

Answer: C Explanation:

EIGRP uses the Neighbor Table to list adjacent routers. The Topology Table list all the learned routers to destination whilst the Routing Table contains the best route to a destination, which is known as the Successor. The Feasible Successor is a backup route to a destination which is kept in the Topology Table.

Question No: 128 – (Topic 3)

Which two statements describe the process identifier that is used in the command to configure OSPF on a router? (Choose two.)

Router(config)# router ospf 1

  1. All OSPF routers in an area must have the same process ID.

  2. Only one process number can be used on the same router.

  3. Different process identifiers can be used to run multiple OSPF processes

  4. The process number can be any number from 1 to 65,535.

  5. Hello packets are sent to each neighbor to determine the processor identifier.

Answer: C,D Explanation:

Multiple OSPF processes can be configured on a router using multiple process ID’s. The valid process ID’s are shown below:

Edge-B(config)#router ospf ?

lt;1-65535gt; Process ID

Question No: 129 – (Topic 3)

Refer to the exhibit.

image

A network administrator configures a new router and enters the copy startup-config running-config command on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enters the system configuration dialog as shown. What is the cause of the problem?

  1. The network administrator failed to save the configuration.

  2. The configuration register is set to 0x2100.

  3. The boot system flash command is missing from the configuration.

  4. The configuration register is set to 0x2102.

  5. The router is configured with the boot system startup command.

Answer: A Explanation:

The 鈥淪ystem Configuration Dialog鈥?appears only when no startup configuration file is found. The network administrator has made a mistake because the command 鈥渃opy startup-config running-config鈥?will copy the startup config (which is empty) over the running config (which is configured by the administrator). So everything configured was deleted.

Note: We can tell the router to ignore the start-up configuration on the next reload by setting the register to 0脳2142. This will make the 鈥淪ystem Configuration Dialog鈥?appear at the next reload.

Question No: 130 – (Topic 3)

What OSPF command, when configured, will include all interfaces into area 0?

A. network 0.0.0.0 255.255.255.255 area 0

B. network 0.0.0.0 0.0.0.0 area 0

C. network 255.255.255.255 0.0.0.0 area 0

D. network all-interfaces area 0

Answer: A Explanation:

Example 3-1 displays OSPF with a process ID of 1 and places all interfaces configured with an IP address in area 0. The network command network 0.0.0.0 255.255.255.255 area 0 dictates that you do not care (255.255.255.255) what the IP address is, but if an IP address is enabled on any interface, place it in area 0.

Example 3-1 Configuring OSPF in a Single Area

router ospf 1

network 0.0.0.0 255.255.255.255 area 0

Reference: http://www.ciscopress.com/articles/article.asp?p=26919amp;seqNum=3

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