World of Computer Networking Your CCNA start - Classes of Internet Protocol (IP) Addresses

The video tutorial explains the necessity of IP addressing in the network layer of the TCP/IP model, highlighting the limitations of MAC addresses. It covers the role of routers in building routing tables and finding optimal paths. The tutorial delves into the different classes of IP addresses (A, B, C, D, E), their ranges, and default network masks. It also discusses the reserved nature of Class D for multicasting and Class E for experimental purposes. The video concludes with a note on the loopback address range reserved for local host purposes.

Why is IP addressing necessary in the network layer of the TCP/IP model?

• To uniquely identify devices on a network

• To increase network speed

• To replace MAC addresses

• To encrypt data packets

What is the primary role of a router in a network?

• To manage network security

• To convert data packets into signals

• To build routing tables and find optimal paths

• To assign IP addresses to devices

Which of the following is a characteristic of Class A IP addresses?

• They start with the bits 110

• They have a default network mask of 255.255.0.0

• They start with the bit 0

• They are reserved for multicasting

What is the default network mask for Class B IP addresses?

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

• 255.255.255.255

Which class of IP addresses is reserved for multicasting?

• Class A

• Class B

• Class D

• Class E

Which IP address class is reserved for future experimental use?

• Class E

• Class D

• Class C

• Class A

What is the purpose of the IP address range starting with 127?

• For assigning to routers

• For future experimental use

• For external network communication

• For loopback and testing purposes