✅ IPv4 Rules Flashcards by RANDY OWENS

Q

What does an IPv4 address identify

A

A device on a network

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Q

How many bits are in an IPv4 address

A

32 bits

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Q

How many octets are in an IPv4 address

A

4 octets

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Q

How many bits are in each octet

A

8 bits

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Q

Valid decimal range of each IPv4 octet

A

0 to 255

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Q

What determines network and host portions in classful addressing

A

IP address class

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Q

What determines network and host portions in CIDR addressing

A

Subnet mask

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Q

Class A first octet range

A

1 to 126

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Q

Default subnet mask Class A

A

255.0.0.0

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Q

Class B first octet range

A

128 to 191

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Q

Default subnet mask Class B

A

255.255.0.0

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Q

Class C first octet range

A

192 to 223

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Q

Default subnet mask Class C

A

255.255.255.0

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Q

What IPv4 class is 127 reserved for

A

Loopback testing

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Q

Loopback address example

A

127.0.0.1

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Q

Purpose of loopback address

A

Test local TCP IP stack

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Q

Class D address range

A

224 to 239

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Q

Purpose of Class D addresses

A

Multicast traffic

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Q

Class E address range

Study These Flashcards

A

240 to 255

Q

Purpose of Class E addresses

Study These Flashcards

A

Experimental use

Q

Private Class A range

Study These Flashcards

A

10.0.0.0 to 10.255.255.255

Q

Private Class B range

Study These Flashcards

A

172.16.0.0 to 172.31.255.255

Q

Private Class C range

Study These Flashcards

A

192.168.0.0 to 192.168.255.255

Q

Purpose of private IP addresses

Study These Flashcards

A

Used inside local networks not routable on internet

What converts private IP to public IP

NAT

What does NAT stand for

Network Address Translation

APIPA address range

169.254.0.1 to 169.254.255.254

When APIPA is assigned

When DHCP server unavailable

What does APIPA stand for

Automatic Private IP Addressing

IPv4 broadcast address purpose

Send message to all hosts on network

Example broadcast address

192.168.1.255

Network address purpose

Identify the network itself

Example network address

192.168.1.0

First usable address rule

Network address plus one

Last usable address rule

Broadcast address minus one

CIDR slash notation example slash 24 meaning

255.255.255.0 subnet mask

CIDR slash notation example slash 16 meaning

255.255.0.0 subnet mask

CIDR slash notation example slash 8 meaning

255.0.0.0 subnet mask

What does DHCP do

Automatically assigns IP addresses

What does DNS do

Resolves names to IP addresses

What does default gateway do

Allows access outside local network

Example default gateway address

Usually ends in .1

IPv4 uses what number system

Decimal

Binary bits per IPv4 address

32 bits total

Hosts per Class C network default

254 hosts

Hosts per Class B network default

65534 hosts

Hosts per Class A network default

16777214 hosts