Net+ 5.1 IP Addresses

What organization is responsible for allocating public IP addresses?

IANA The Internet Assigned Numbers Authority.

How does the IANA break up IP addresses?

IANA allocates blocks of IP addresses to Regional Internet Registries (RIRs). An RIR has authority over IP addresses in a specific region of the world

You recently created a new network segment for Development. Because the hosts are now on a different network segment, they can no longer contact the DHCP server. Both network segments are connected via a Cisco router. What would be the best action to take in order to fix the problem?

Implement an IP Helper address on the router.

What is a Host addresses part of an IP address?

It's the unique Ip addigned for the computer. The host is the remaining octets of the Network address.

What is Partial Subnetting or Variable-length subnetmasking (VLSM)

It's where a subnet is broken up in the middle of the bionary. For example If a subnet mask is 255.192.0.0 then it is 11111111.11000000.00000000.00000000 The 1's represent the network address and the 0's represent the Host addresses. In this example hosts can be used all the way up to x.63.255.254. x.63.255.255 is the Subnet Broadcast Address

Who assigns blocks of addresses to Internet Service Providers (ISPs)?

Regional Internet Registries (RIRs)

What is IP Static (manual) assignment?

Static addressing means that IP configuration information is manually configured on each host.

What is the purpose of subnetting?

Subnets divide an IP network address into multiple network addresses.

What is Subnetting?

Subnetting is the process of dividing a large network into smaller networks called subnets. When you subnet a network, each network segment has a different network address (also called a subnet address). In practice, the terms network and subnet are used interchangeably to describe a physical network segment with a unique network address.

You manage a subnet that uses the following subnet address: 198.162.1.0/23. What best describes how addressing is configured for the subnet?

Supernetting. With supernetting, multiple smaller subnets are combined into a single larger subnet. Supernetting is performed by taking the default subnet mask and making is smaller *using less bits).

What is a Class A IP range?

1.0.0.0 to 126.255.255.255

What is a Class B IP range?

128.0.0.0 to 191.255.255.255

A host on the network has an IP address of 129.11.99.78 using the default subnet mask. How would you identify the address and mask using CIDR notation.

129.11.99.78/16

You've decided to use a subnet mask of 255.255.192.0 on the 172.17.0.0 network to create four separate subsets Name the 4 network ID's that could be assigned to these subnets in this configuration

172.17.0.0 172.17.64.0 172.17.128.0 172.17.192.0

What is a Class C IP range?

192.0.0.0 to 223.255.255.255

What is a Class D IP range?

224.0.0.0 to 239.255.255.255

What is a Class E IP range?

240.0.0.0 to 255.255.255.255

What is a Dynamic Host Configuration Protocol (DHCP)?

A DHCP server is a special server configured to pass out IP addresses and other IP configuration information to network clients. It ensures that each client is assigned a unique IP address.

How many Bits is a Subnet address?

A subnet mask is a 32-bit number associated with an IP address that identifies the network portion of the address.

What is a Local Host address?

Addresses in the 127.0.0.0 range are reserved to refer to the local host (the host you're currently working at). The most commonly used address is 127.0.0.1, which is the loopback address.

How many Bits is a IP address?

An IP address is a 32-bit binary number represented as four octets (four 8-bit numbers).

When referring to a Network Address part of an IP address which part is it?

Class A would be the first occtet, Class B the first two, and Class C the first 3.

You manage a server that uses an IP address of 192.168.255.188 with a mask of 255.255.0.0. What best describes the address type?

Classless Because the IP address is not using the default subnet mask, it is using classless addressing. Classless addressing modifies the length of the subnet mask, using a custom mask value instead of the default subnet mask.

Who manages the assignment of IP addresses on the Internet?

The Internet Assigned Numbers Authority (IANA)

What does a broadcast part of an IP address mean?

The last address in the range is the broadcast address, and it is used to send messages to all hosts on the network. In binary form, the broadcast address has all 1s in the host portion of the address.

What is classless subnetting?

Using custom subnet masks is often called classless addressing because the subnet mask cannot be inferred simply from the class of a given IP address. The address class is ignored and the mask is always supplied to identify the network and host portions of the address.

What is supernetting?

While subnetting divides a large address space into multiple subnets, supernetting combines multiple small network addresses into a single larger network. Supernetting allows multiple Class C addresses to be combined into a single network.