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Home Cisco® 100-105

Cisco® 100-105 Exam Practice Questions (P. 2)

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Question #11
Which statement about a router on a stick is true?
  1. A
    Its data plane routes traffic for a single VLAN over two or more switches.
  2. B
    It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs on the same subnet
  3. C
    It requires the native VLAN to be disabled.
  4. D
    It uses multiple subinterfaces of a single interface to encapsulate traffic for different VLANs.

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

Question #12
Which routing protocol has the smallest default administrative distance?
  1. A
    IBGP
  2. B
    OSPF
  3. C
    IS-IS
  4. D
    EIGRP
  5. E
    RIP

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

Question #13
Two hosts are attached to a switch with the default configuration. Which statement about the configuration is true?
  1. A
    IP routing must be enabled to allow the two hosts to communicate.
  2. B
    The two hosts are in the same broadcast domain.
  3. C
    The switch must be configured with a VLAN to allow the two hosts to communicate.
  4. D
    Port security prevents the hosts from connecting to the switch.

Correct Answer:
B

Question #14
Which MTU size can cause a baby giant error?
  1. A
    1500
  2. B
    9216
  3. C
    1600
  4. D
    1518

Correct Answer:
C
Standard Ethernet frame MTU is 1500 bytes. This does not include the Ethernet header and Cyclic Redundancy Check (CRC) trailer, which is 18 bytes in length, to make the total Ethernet frame size of 1518. In this document, MTU size or packet size refers only to Ethernet payload. Ethernet frame size refers to the whole
Ethernet frame, including the header and the trailer. Baby giant frames refer to Ethernet frame size up to 1600 bytes, and jumbo frame refers to Ethernet frame size up to 9216 bytes.
Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/29805-175.html

Question #15
Which statement about static routes is true?
  1. A
    The source interface can be configured to make routing decisions.
  2. B
    A subnet mask is entered for the next-hop address.
  3. C
    The subnet mask is 255.255.255.0 by default.
  4. D
    The exit interface can be specified to indicate where the packets will be routed.

Correct Answer:
D
Static routing can be used to define an exit point from a router when no other routes are available or necessary. This is called a default route.

Question #16
Which two statements describe the IP address 10.16.3.65/23? (Choose two.)
  1. A
    The lowest host address in the subnet is 10.16.2.1 255.255.254.0.
  2. B
    The last valid host address in the subnet is 10.16.2.254 255.255.254.0.
  3. C
    The network is not subnetted.
  4. D
    The broadcast address of the subnet is 10.16.3.255 255.255.254.0.
  5. E
    The subnet address is 10.16.3.0 255.255.254.0.

Correct Answer:
AD
The mask 255.255.254.0 (/23) used with a Class A address means that there are 15 subnet bits and 9 host bits. The block size in the third octet is 2 (256 - 254).
So this makes the subnets in 0, 2, 4, 6, etc., all the way to 254. The host 10.16.3.65 is in the 2.0 subnet. The next subnet is 4.0, so the broadcast address for the
2.0 subnet is 3.255. The valid host addresses are 2.1 through 3.254

Question #17
Which NAT type is used to translate a single inside address to a single outside address?
  1. A
    dynamic NAT
  2. B
    NAT overload
  3. C
    PAT
  4. D
    static NAT

Correct Answer:
D
Network address translation (NAT) is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device.
There are two different types of NAT:

NAT -

PAT -
Static NAT is used to statically map a single IP address on the inside to a single outside IP address.

Question #18
Which option is a valid hostname for a switch?
  1. A
    5witch-Cisco
  2. B
    Switch-Cisco!
  3. C
    5witchCisc0
  4. D
    SwitchCisc0

Correct Answer:
D
Hostnames cant start with a number and cant have special characters (bangs/exclamation) (but can have a dash).
A starts with a number.
B has a bang at the end.
C starts with a number.
Only D is correct.

Question #19
Which function enables an administrator to route multiple VLANs on a router?
  1. A
    IEEE 802.1X
  2. B
    HSRP
  3. C
    port channel
  4. D
    router on a stick

Correct Answer:
D

Question #20
Which NTP command configures the local device as an NTP reference clock source?
  1. A
    ntp peer
  2. B
    ntp broadcast
  3. C
    ntp master
  4. D
    ntp server C

Correct Answer:
Explanation

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