[2021-New] Cisco 100-105 Dumps With Update Exam Questions (131-140)

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100-105 Exam Questions - Online Test

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Q1. - (Topic 7)

Which RFC was created to alleviate the depletion of IPv4 public addresses?

A. RFC 4193

B. RFC 1519

C. RFC 1518

D. RFC 1918

Answer: C

Q2. - (Topic 3)

Refer to the graphic.

R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two.)

A. All of the routers need to be configured for backbone Area 1.

B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.

C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.

D. The hello and dead interval timers are not set to the same values on R1 and R3.

E. EIGRP is also configured on these routers with a lower administrative distance.

F. R1 and R3 are configured in different areas.

Answer: D,F

Explanation:

This question is to examine the conditions for OSPF to create neighborhood.

So as to make the two routers become neighbors, each router must be matched with the

following items:

The area ID and its types;

Hello and failure time interval timer;

OSPF Password (Optional);

Q3. - (Topic 3)

Which characteristics are representative of a link-state routing protocol? (Choose three.)

A. provides common view of entire topology

B. exchanges routing tables with neighbors C. calculates shortest path

D. utilizes event-triggered updates

E. utilizes frequent periodic updates

Answer: A,C,D

Explanation:

Each of routers running link-state routing protocol learns paths to all the destinations in its

“area” so we can say although it is a bit unclear.

Link-state routing protocols generate routing updates only (not the whole routing table)

when a change occurs in the network topology so

Link-state routing protocol like OSPF uses Dijkstra algorithm to calculate the shortest path -> .

Unlike Distance vector routing protocol (which utilizes frequent periodic updates), link-state

routing protocol utilizes event-triggered updates (only sends update when a change occurs)

Q4. - (Topic 3)

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 “ip route” statement.

Q5. - (Topic 1)

Which two characteristics apply to Layer 2 switches? (Choose two.)

A. Increases the number of collision domains

B. Decreases the number of collision domains

C. Implements VLAN

D. Decreases the number of broadcast domains

E. Uses the IP address to make decisions for forwarding data packets

Answer: A,C

Explanation:

Layer 2 switches offer a number of benefits to hubs, such as the use of VLANs and each switch port is in its own separate collision domain, thus eliminating collisions on the segment.

Q6. - (Topic 3)

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.

Q7. - (Topic 7)

Two hosts are attached to a switch with the default configuration. Which statement about the configuration is true?

A. IP routing must be enabled to allow the two hosts to communicate.

B. The two hosts are in the same broadcast domain.

C. The switch must be configured with a VLAN to allow the two hosts to communicate.

D. Port security prevents the hosts from connecting to the switch.

Answer: A

Explanation: IP routing must be enables to allow the two hosts to communicate with each other with default configuration. http://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/41860-howto-L3-intervlanrouting.html

Q8. - (Topic 5)

Why would a network administrator configure port security on a switch?

A. to prevent unauthorized Telnet access to a switch port

B. to prevent unauthorized hosts from accessing the LAN

C. to limit the number of Layer 2 broadcasts on a particular switch port

D. block unauthorized access to the switch management interfaces

Answer: B

Explanation:

You can use the port security feature to restrict input to an interface by limiting and identifying MAC addresses of the stations allowed to access the port. When you assign secure MAC addresses to a secure port, the port does not forward packets with source addresses outside the group of defined addresses. If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the workstation attached to that port is assured the full bandwidth of the port. If a port is configured as a secure port and the maximum number of secure MAC addresses is reached, when the MAC address of a station attempting to access the port is different from any of the identified secure MAC addresses, a security violation occurs. Also, if a station with a secure MAC address configured or learned on one secure port attempts to access another secure port, a violation is flagged.

Q9. - (Topic 7)

Which statement about a router on a stick is true?

A. Its date plane router traffic for a single VI AN over two or more switches.

B. It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs on the same subnet.

C. It requires the native VLAN to be disabled.

D. It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs.

Answer: D

Explanation:

https://www.freeccnaworkbook.com/workbooks/ccna/configuring-inter-vlan-routing-router-on-a-stick

Q10. - (Topic 1)

Refer to the exhibit.

The output is from a router in a large enterprise. From the output, determine the role of the router.

A. A Core router.

B. The HQ Internet gateway router.

C. The WAN router at the central site.

D. Remote stub router at a remote site.

Answer: D

Explanation:

Since the routing table shows only a single default route using the single interface serial 0/0, we know that this is most likely a remote stub site with a single connection to the rest of the network. All the other answer options would mean that this router would have more connections, and would contain more routes.