Cisco: Skills for All: Module 6: IPv4 Structure

What is an IPv4 address made of?

• Network Portion

• Host Portion

• Subnet Portion

• Admin Portion

If all devices are on the same network, then

• all of their bits are identical

• all of their bits are NOT identical

• all of their numbers are identical

• all of their hex are identical

Answer explanation

The bits within the network portion of the address must be identical for all devices that reside in the same network. The bits within the host portion of the address must be unique to identify a specific host within a network. If two hosts have the same bit-pattern in the specified network portion of the 32-bit stream, those two hosts will reside in the same network.

How do hosts know what portion of the 32-bit address is the network and what is the host?

• Router password
• Subnet mask
• MAC address
• Default gateway

Assigning an IPv4 address requires 2 parts; what are they?

• IPv4 Address / Subnet

• IPV4 Address / Default Gateway

• Default Gateway / Subnet

• Subnet / MAC Address

To access a remote network, a host computer needs

• a default gateway

• an IP address

• a MAC address

• a remote server

What does a subnet mask do?

Answer explanation

The IPv4 subnet mask is used to differentiate the network portion from the host portion of an IPv4 address. When an IPv4 address is assigned to a device, the subnet mask is used to determine the network address of the device. The network address represents all the devices on the same network.

The process used to identify the network and host portions of an IPv4 address is called

• ANDing

• ORing

• ANGling

• Logical

What is the number of bits set to 1 in the subnet mask called?

• Subnet prefix length
• Subnet IP address

• MAC address Subnet

• Subnet Default gateway

Organize this subnet masks

Groups:

(a) /8

,

(b) /16

,

(c) /24

,

(d) /30

• 11111111.00000000.00000000.00000000

• 255.255.255.0

• 11111111.11111111.11111111.00000000

• 255.255.0.0

• 255.0.0.0

• 11111111.111111111.00000000.00000000

• 11111111.11111111.11111111.11111100

• 255.255.255.252

Convert this binary IP to decimal

11000000.00000011.10000000.00000001