CCNA Network Essentials Questions

1.     How many bits are in a MAC Address and how is a MAC address commonly represented?

2.     What connector is used in CAT5e twisted pair cable?

3.     Which cable type is commonly used in LAN?

4.     In which physical Topology do devices connect to a Central Device.

5.     How many broadcast domains & collision domains are created when you segment a network with a 12-port switch?

6.     What are the layers of the OSI model?

7.     Which layer is responsible for determining the availability of a recipient peer?

8.     Name the PDUs of Transport, Network, Datalink & Physical layers?

9.     Which layer determines path selection in an internetwork?

10.  Which includes more overhead, connection-oriented or connectionless services?

11.  What network component allows a computer to transmit data over a standard telephone line?

12.  Which protocol resolves Host Names to IP addresses?

13.  What is the range of well-known port numbers?

14.  What are the two sub layers of Datalink layer?

15.  Which protocol discovers MAC address from a host’s IP address?

16.  Which layer of the OSI Model defines signal rate and voltages used for data transmission?

17.  At which layer of the OSI Model does a NIC operate?

18.  At which layer of the OSI Model does a HUB operate?

19.  At which layer of the OSI Model does a switch operate?

20.  At which layer of the OSI Model do encryption and decryption happen?

21.  What is ICMP?

22.  Which transport layer protocol does DHCP use?

23.  Which protocol does PING use? What is the full form of PING?

24.  What does 100baseTx represent?

25.  Mention a couple of basic differences between FTP and TFTP?

26.  What are the differences between TCP and UDP?

27.  What are the port numbers of DNS, Telnet, SMTP and POP3?

28.  What is FTP port number for data channel & control channel?

29.  Which media access method is used commonly by IEEE 802.3 standards?

30.  Which cable type can transmit data over a 1000 metre distance without a repeater?

31.  Which type of WAN provides a dedicated bandwidth link between offices?

32.  What are the 3 layers of cisco model?

33.  Which type of WAN connection provides a shared bandwidth permanent connection?

34.  What do DTE & DCE stand for in a WAN environment?

35.  What does CSU/DSU stand for?