Question 1

Where is a hub specified in the OSI model?

Accepted Answer

Hubs are specified or operate at Layer1 i.e, the physical layer in the OSI model. Hubs regenerate electrical signals. A hub sends data packets (frames) to all devices on a network, regardless of any MAC addresses contained in the data packet.

Question 2

Which layer 4 protocol is used for a Telnet connection?

Accepted Answer

Telnet uses TCP at layer 4. It uses IP at layer 3. We know that Telnet uses TCP/IP protocol, but in the question, it is asked specifically at layer 4 what is used in Telnet. So it is TCP at layer4 and IP at layer 3.

Question 3

How long is an IPv4 address?

Accepted Answer

Internet Protocol version 4 (IPv4) which defined an IP address as a 32-bit value IPv4 is in contrast to IPv6, which defined an IP address as a 128 bits value.

Question 4

How many bits are in a MAC address?

Accepted Answer

MAC - Media Access Control, address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address. MAC addresses are 6-byte (48-bits) in length, and are written in MM:MM:MM:SS:SS:SS format.

Networking Questions