CCNA ( IOS and Security Device Manager 2 )

You type the following command into the router and receive the following output:

Router#show serial 0/0
        ^
% Invalid input detected at '^' marker.

Why was this error message displayed?

A. You need to be in privileged mode.

B. You cannot have a space between serial and 0/0.

C. The router does not have a serial0/0 interface.

D. Part of the command is missing.

Answer & Explanation
Answer: Option D

Explanation:

You can view the interface statistics from user mode, but the command is show interface serial 0/0.

Read More

CCNA ( IOS and Security Device Manager 1 )

Which of the following commands sets the secret password to Cisco?

A. enable secret password Cisco

B. enable secret cisco

C. enable secret Ciscohttp://www.makkalsanthai.com/

D. enable password Cisco




Answer & Explanation
Answer: Option C

Explanation:

The enable secret password is case sensitive, so the second option is wrong. To set the enable secret <password>, use the enable secret <password> command from global configuration mode.

Read More

CCNA (TCP/IP Question 19)

What is the address range of a Class B network address in binary?

A. 01xxxxxx

B. 0xxxxxxx

C. 10xxxxxx

D. 110xxxxx


Answer & Explanation
Answer: Option C

Explanation:

The range of a Class B network address is 128-191. This makes our binary range 10xxxxxx.

Read More

CCNA (TCP/IP Question 18)

 
Which of the following protocols uses both TCP and UDP?

A. FTP

B. SMTP

C. Telnet

D. DNS



Answer & Explanation
Answer: Option D

Explanation:

DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.

Read More

CCNA (TCP/IP Question 17)

What protocol is used to find the hardware address of a local device?

A. RARP

B. ARP

C. IP

D. ICMP



Answer & Explanation
Answer: Option B

Explanation:

Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.

Read More

CCNA (TCP/IP Question 16)

Which of the following are TCP/IP protocols used at the Application layer of the OSI model?

1. 
   
2. IP
3. TCP
4. Telnet
5. FTP
6. TFTP

A. 1 and 3

B. 1, 3 and 5

C. 3, 4 and 5

D. All of the above



Answer & Explanation
Answer: Option C

Explanation:

Telnet, File Transfer Protocol (FTP), and Trivial FTP (TFTP) are all Application layer protocols. IP is a Network layer protocol. Transmission Control Protocol (TCP) is a Transport layer protocol.

Read More

CCNA (TCP/IP Question 15)

 
Which statements are true regarding ICMP packets?

1. ICMP guarantees datagram delivery.
2. ICMP can provide hosts with information about network problems.
3. ICMP is encapsulated within IP datagrams.
4. ICMP is encapsulated within UDP datagrams.

A. 1 only

B. 2 and 3

C. 1 and 4

D. All of the above



Answer & Explanation
Answer: Option B

Explanation:

ICMP is used for diagnostics and destination unreachable messages. ICMP is encapsulated within IP datagrams, and because it is used for diagnostics, it will provide hosts with information about network problems.

Read More