Networking Basics Questions and Answers updated daily – Networking



15 Networking Basics Questions and answers section with explanation for various online exam preparation, various interviews, Networking Networking Basics online test. Networking Basics Questions with detailed description, explanation will help you to master the topic.

Networking Basics Questions

1.     How often are BPDUs sent from a layer 2 device



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Correct Ans:Every 2 seconds
Explanation:
Every 2 seconds, BPDUs are sent out from all active bridge ports by default.


2. Which protocol is used to send a destination network unknown message back to originating hosts?



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Correct Ans:ICMP
Explanation:
ICMP is the protocol at the Network layer that is used to send messages back to an originating router.


3.    Where is a hub specified in the OSI model



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Correct Ans:Physical layer
Explanation:
Hubs regenerate electrical signals, which are specified at the Physical layer.


4. Which command is used to determine if an IP access list is enabled on a particular interface?



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Correct Ans:show ip interface
Explanation:
The show ip interface command will show you if any outbound or inbound interfaces have an access list set.


5.   Which protocol does DHCP use at the Transport layer



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Correct Ans:UDP
Explanation:
User Datagram Protocol is a connection network service at the Transport layer, and DHCP uses this connectionless service.


6. Which of the following commands will allow you to set your Telnet password on a Cisco router?



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Correct Ans:line vty 0 4
Explanation:
The command line vty 0 4 places you in a prompt that will allow you to set or change your Telnet password.


7. What protocol does PPP use to identify the Network layer protocol?



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Correct Ans:NCP
Explanation:
Network Control Protocol is used to help identify the Network layer protocol used in the packet.


8. To back up an IOS, what command will you use?



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Correct Ans:copy flash tftp
Explanation:
The command copy flash tftp will prompt you to back up an existing IOS in flash to a TFTP host.


9. Which of the following is the valid host range for the subnet on which the IP address 192.168.168.188 255.255.255.192 resides?



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Correct Ans:192.168.168.129-190
Explanation:
256 - 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast address is 191, and the valid host range is the numbers in between, or 129-190.


10. Which WLAN IEEE specification allows up to 54Mbps at 2.4GHz?



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Correct Ans:G
Explanation:
IEEE 802.11B is 2.4GHz, but with a maximum of only 11Mbps. IEEE 802.11G is in the 2.4GHz range, with a top speed of 54Mbps.


11. You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?



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Correct Ans:10 Mbps
Explanation:
Each device has 10 Mbpsto the server.


12. What command is used to create a backup configuration?



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Correct Ans:copy running-config startup-config
Explanation:
The command to back up the configuration on a router is copy running-config startup-config.


13.
What are the two main types of access control lists (ACLs)?

Standard
IEEE
Extended
Specialized



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Correct Ans:1 and 3
Explanation:
Standard and extended access control lists (ACLs) are used to configure security on a router.


14. What flavor of Network Address Translation can be used to have one IP address allow many users to connect to the global Internet?



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Correct Ans:PAT
Explanation:
Port Address Translation (PAT) allows a one-to-many approach to network address translation.


15.   How long is an IPv6 address



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Correct Ans:128 bits
Explanation:
An IPv6 address is 128 bits long.



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