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 CISCO Certification Questions

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Q:

When a PC sends a packet to another PC in a remote network, what destination IP address and MAC address will be in the frame that it sends to its default gateway?

Answer

It will use the gateway interface MAC at L2 and the actual destination IP at L3. 

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Subject: CCNA

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Q:

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

A) 01xxxxxx B) 0xxxxxxx
C) 10xxxxxx D) 110xxxxx
 
Answer & Explanation Answer: C) 10xxxxxx

Explanation:

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

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Q:

Which IEEE committee has been sanctioned by WAP and is called WPA2?

Answer

The IEEE 802.11i standard has been sanctioned by WPA and is termed WPA version 2.

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Subject: CCNA

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Q:

What command would you use to create an extended access list that stops host 172.16.10.1 fro telnetting to host 172.16.30.5?

Answer

access - list 110 deny tcp host


172.16.10.1  host  172.16.30.5  eq  23


access - list 110 permit ip any any

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Subject: CCNA

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Q:

As a network administrator we want to make it easy to assign IP addresses to hosts. What protocol do we use?

A) DNS B) DHCP
C) HSRP D) NTP
 
Answer & Explanation Answer: B) DHCP

Explanation:

Explanation: DHCP, as described by RFC 1541, or Dynamic Host Configuration Protocol is used for dynamically assigning network addresses and host specific configuration parameters.

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Q:

What port number is used for FTP control?

A) 20 B) 21
C) 22 D) 25
 
Answer & Explanation Answer: B) 21

Explanation:
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Q:

What type of address translation can use only one address to allow thousands of hosts to be translated globally?

Answer

Port Address Translation (PAT), also called NAT Overload

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Subject: CCNA

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Q:

You copy a configuration from a network host to a router's RAM. The configuration looks correct, yet it is not working at all. What could the problem be?

A) You copied the wrong configuraion into RAM B) You copied the configuration into flash memory instead
C) The copy did not override the shutdown command in running-config D) The IOS became corrupted after the copy command was initiated
 
Answer & Explanation Answer: C) The copy did not override the shutdown command in running-config

Explanation:

Since the configuration looks correct, you probably didn't screw up the copy job. However , when you perform a copy from a network host to a router , the interfaces are automatically shut dow and need to be manually enabled with the no shutdown command.

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