Subnetting: Questions

What is the default subnet mask for Network class A?

255.0.0.0

What is the default subnet mask for Network class B?

255.255.0.0

What is the default subnet mask for Network class C?

255.255.255.0

What is the IP range for Network class A?

1 - 126

What is the IP range for Network class B?

128 - 191

What is the IP range for Network class C?

192 - 223

What are 3 reasons a network administrator might create subnets in order to separate traffic?

(1) Enhance security

(2) Improve performance

(3) Simplify troubleshooting

Subnets must be connected to the network by what device?

Routers or other Layer 3 devices.

What is the IP address range for Class A segments network ID?

0 - 7

What is the IP address range for Class B segments network ID?

0 - 15

What is the IP address range for Class C segments network ID?

0 - 23

What is the IP address range for Class A segments host ID?

8 - 31

What is the IP address range for Class B segments host ID?

16 - 31

What is the IP address range for Class C segments host ID?

24 - 31

8 bits equals

1 byte or 1 octet

In dotted decimal notation, a decimal number ranges between?

0 and 255 (256 possibilities)

What does a node's network class provide?

Information about the segment or network to which the node belongs.

What protocol assigns IP addresses and host names automatically rather than statically?

DHCP (Dynamic Host Configuration Protocol)

What happens where subnetting is implemented?

Each subnet's traffic is separated from every other subnet's traffic.

Complete the sentence...

Routers forward frames only as...

Needed to reach their destination.

What 2 advantages does subnetting limit by decreasing the size of each domain?

(1) Amount of broadcast traffic

(2) Collisions on Ethernet networks

IPv4 consists of what 2 pieces of information?

(1) Network

(2) Host

127.0.0.1 IPv4 Address is reserved for?

Loopback

10.0.0.0 - 10.255.255.255 IPv4 Address is reserved for?

Private

172.16.0.0 - 172.31.255.255 IPv4 Address is reserved for?

Private

192.168.0.0 - 192.168.255.255 IPv4 Address is reserved for?

Private

169.254.1.0 - 169.254.254.255 IPv4 Address is reserved for?

Link Local

Addresses whose host information - 255 IPv4 Address is reserved for?

(For example: 199.34.89.255)

Broadcast

Addresses whose host information = 0 IPv4 Address is reserved for?

(For example: 199.34.89.0)

Network ID

Because the octets equal to 0 and 255 are reserved, what are the numbers that can used for host information in an IPv4 address?

1 - 254

Adhering to a fixed network ID size limits?

The number of hosts a network can have.

Class A addresses are used by?

Large companies and government organizations.

Class B addresses are used by?

Midsized organizations.

Class C addresses are used by?

Smaller organizations, such as colleges.

What is the command to view IP information on a Windows machine?

ipconfig /all

What is the command to view IP information on a Linux or UNIX machine?

ifconfig -a

How is the IP address labeled on an Linux or UNIX machine?

inet addr