[2021-New] Cisco 100-105 Dumps With Update Exam Questions (5-14)

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New Cisco 100-105 Exam Dumps Collection (Question 5 - Question 14)

Question No: 5

Which two VLANs are reserved for system use only? (Choose two)

A. 1

B. 4095

C. 4096

D. 0

E. 1001

Answer: B,D

Explanation:

The VLANs 0 and 4095 are reserved by the IEEE 802.1Q standard and you cannot create, delete, or modify them so they are the correct answers.

Note:

+ VLAN 0 and 4095 are reserved for system use only. You cannot see or use these VLANs.

+ VLAN 1 and VLANs 1002-1005 are default VLANs. Default VLANs are created automatically and cannot be configured or deleted by users.

+ VLAN 2 to 1001 are normal VLANs. You can create, use and delete them.

+ VLAN 1002 to 1005 are normal VLANs too but Cisco reserved for FDDI an Token Ring.

Question No: 6

Configuration of which option is required on a Cisco switch for the Cisco IP phone to work?

A. PortFast on the interface

B. the interface as an access port to allow the voice VLAN ID

C. a voice VLAN ID in interface and global configuration mode

D. Cisco Discovery Protocol in global configuration mode

Answer: B

Explanation: Explanation

When you connect an IP phone to a switch using a trunk link, it can cause high CPU utilization in the switches. As all the VLANs for a particular interface are trunked to the phone, it increases the number of STP instances the switch has to manage. This increases the CPU utilization. Trunking also causes unnecessary broadcast / multicast / unknown unicast traffic to hit the phone link.

In order to avoid this, remove the trunk configuration and keep the voice and access VLAN configured along with Quality of Service (QoS). Technically, it is still a trunk, but it is called a Multi-VLAN Access Port (MVAP). Because voice and data traffic can travel through the same port, you should specify a different VLAN for each type of traffic. You can configure a switch port to forward voice and data traffic on different VLANs. Configure IP phone ports with a voice VLAN configuration. This configuration creates a pseudo trunk, but does not require you to manually prune the unnecessary VLANs.

The voice VLAN feature enables access ports to carry IP voice traffic from an IP phone. You can configure a voice VLAN with the u201cswitchport voice vlan u2026u201d command under interface mode. The full configuration is shown below:

Switch(config)#interface fastethernet0/1 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 10 Switch(config-if)#switchport voice vlan 20

Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4500-series-

switches/69632-configuring-cat-ip-phone.html

Configure the Switch Port to Carry Both Voice and Data TrafficWhen you connect an IP phone to a switch using a trunk link, it can cause high CPU utilization in the switches. As all the VLANs for a particular interface are trunked to the phone, it increases the number of STP instances the switch has to manage. This increases the CPU utilization. Trunking also causes unnecessary broadcast / multicast / unknown unicast traffic to hit the phone link.

The voice VLAN feature enables access ports to carry IP voice traffic from an IP phone. The voice VLAN feature is disabled by default. The Port Fast feature is automatically enabled when voice VLAN is configured. When you disable voice VLAN, the Port Fast

feature is not automatically disabled.

Question No: 7

What is the default configuration register setting on most Cisco routers?

A. 0x2210

B. 0x2104

C. 0x2102

D. 0x2012

E. 0x2142

Answer: C

Question No: 8

Which device allows users to connect to the network using a single or double radio?

A. access point

B. switch

C. wireless controller

D. firewall

Answer: A

Question No: 9

How many primary IPv4 addresses can be assigned to an interface?

A. unlimited

B. 8

C. 2

D. 1

Answer: A

Explanation:

CiscoIOS software supports multiple IP addresses per interface. You can specify an unlimited number of secondary addresses.

Question No: 10

Which statement about the default switch configuration for remote access managements is true?

A. The system name is set to Cisco.

B. The Telnet password is set to cisco.

C. No default gateway is defined.

D. One IP address is preconfigured.

Answer: C

Question No: 11

From where does a small network get its IP network address?

A. Internet Assigned Numbers Authority (IANA)

B. Internet Architecture Board (IAB)

C. Internet Service Provider (ISP)

D. Internet Domain Name Registry (IDNR)

Answer: C

Question No: 12

Regarding the extended ping command; which of the statements below are true? (Choose three)

A. The extended ping command is supported from user EXEC mode.

B. The extended ping command is available from privileged EXEC mode.

C. With the extended ping command you can specify the TCP and UDP port to be pinged.

D. With the extended ping command you can specify the timeout value.

E. With the extended ping command you can specify the datagram size.

Answer: B,D,E

Question No: 13

Which routing protocol has the smallest default administrative distance?

A. IBGP

B. OSPF

C. IS-IS

D. EIGRP

E. RIP

Answer: D

Explanation: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/15986-admin-distance.html

Default Distance Value TableThis table lists the administrative distance default values of the protocols that Cisco supports:

Route Source

Default Distance Values

Connected interface 0

Static route 1

Enhanced Interior Gateway Routing Protocol (EIGRP) summary route 5

External Border Gateway Protocol (BGP) 20

Internal EIGRP 90

IGRP 100 OSPF 110

Intermediate System-to-Intermediate System (IS-IS) 115

Routing Information Protocol (RIP) 120

Exterior Gateway Protocol (EGP) 140

On Demand Routing (ODR) 160

External EIGRP 170

Internal BGP 200

Unknown* 255

Question No: 14

When troubleshooting a LAN interface operating in full duplex mode, which error condition can be immediately ruled out?

A. giants

B. no buffers

C. collisions

D. ignored

E. dribble condition

Answer: C

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