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 CCNA Questions

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Q:

Which of the following devices do not operate at all levels of the OSI model?

A) Network management stations (NMSs) B) Routers
C) Web and application servers D) Network hosts
 
Answer & Explanation Answer: B) Routers

Explanation:

Routersoperate no higher than layer 3 of the OSI model.

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Q:

What command will display the forward / filter table?

A) Show mac filter B) show run
C) show mac address-table D) show mac filter-table
 
Answer & Explanation Answer: C) show mac address-table

Explanation:

The Command show mac address-table displays the forward/filter table on the switch.

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Q:

Mention different memories used in a CISCO router ?

Answer

Different Memories used in a CISCO router are as follows :


NVRAM stores the startup configuration file.

DRAM stores the configuration file that is being executed.

Flash Memory – stores the Cisco IOS.

 

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Subject: CCNA
Job Role: Network Engineer

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Q:

When creating a pool of global address, which of the following can be used instead of the netmask command?

A) / (slash notation) B) prefix - length
C) no mask D) block - size
 
Answer & Explanation Answer: B) prefix - length

Explanation:

Instead of the netmask command, you can use the prefix-length length statement.

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Q:

You want to improve network performance by increasing the bandwidth available to hosts and limit the size of the broadcast domains. Which of the following options will achieve this goal?

A) Managed hubs B) Bridges
C) Switches D) Switches configured with VLANs
 
Answer & Explanation Answer: D) Switches configured with VLANs

Explanation:

By creating and implementing VLANs in your switched network, you can break up broadcast domains at layer2. For hosts on different VLANs to communicate, you must have a router or layer 3 switch. 

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Q:

Which command will allow you to see real - time translations on your router?

A) show ip nat translations B) show ip nat statistics
C) debug ip nat D) clear ip nat translations
 
Answer & Explanation Answer: C) debug ip nat

Explanation:

The command debug ip nat will show you in real time the translations occurring on your router.

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Q:

What command do you type to save the configuration stored in RAM to NVRAM?

A) Router (config) #copy current to starting B) Router #copy starting to running
C) Router (config) #copy running - config startup - config D) Router#copy run start
 
Answer & Explanation Answer: D) Router#copy run start

Explanation:

To copy the running - config to NVRAM so that it will be used if the router is restarted , use the copy running-config startup-config command in privileged mode (copy run start for short).

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Q:

What is the frequency range of the IEEE 802.11g standard?

A) 2.4 Gbps B) 5Gbps
C) 2.4GHz D) 5GHz
 
Answer & Explanation Answer: C) 2.4GHz

Explanation:

The IEEE 802.11b and IEEE 802.11g standards both run in the 2.4GHz RF range.

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