If the NET address of an IS-IS router is 49.0001.1111.1111.1111.1111.00, the area ID of this router is 49.0001.1111.

FALSE

If the NET address of an IS-IS router is 49.0001.1111.1111.1111.1111.00, the area ID of this router is 49.0001.1111.

A Network Entity Title, or ‘NET’, is an address that identifies the router. It consists of the router’s system ID, and the area address. A NET is a type of NSAP address.

Each router’s NET is unique. They can be anywhere from 8 to 20 bytes long, but are often only 10 bytes.

An example of a NET is 49.0001.1720.1600.1001.00. As shown in the example below, this represents the Area-ID, System-ID, and NSEL values.

The address is a series of HEX values, separated by dots. The Area-ID is variable in length, but must be at least one byte. It is often a three-byte value. The first byte (49 in this example) is the AFI, or Address Family Identifier. This is often set to 49 for IS-IS, which is the OSI value for private addressing. 0001 in this example refers to area 1.

The System-ID needs to be unique within the area, but may overlap in different areas. Combining it with the Area-ID makes the entire address unique. In Cisco’s IS-IS implementation, the System-ID is 6 bytes.

Hi, friend!

The answer is True