Ch. 4.3 Flashcards

1
Q

What is classless addressing?

A

IP Network and Subnet ID defined by Network Masks

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2
Q

What is classful addressing?

A

Allocates Network ID based on first octet of the IP Address

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3
Q

What are the Class A first octets?

How many max network addresses can there be?

A

1-126

126

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4
Q

What are the Class B first octets?

A

128-191

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5
Q

What are the Class C first octets?

How many max hosts can there be per address?

A

192-223

254 hosts per address

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6
Q

What is IP range 0.0.0.0/8 for?

A

0.0.0.8 means “This Network”

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7
Q

What is IP range 127.0.0.0/8 for?

A

127.0.0.0/8 is used for loopback addressing

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8
Q

What can a public IP address do?

A

Establish a connection with other Public networks and hosts over the InternetW

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9
Q

Who governs the public IP addresses?

A

IANA

Internet Assigned Numbers Authority

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10
Q

What is the range of Class A private address range?

A

10.0.0.0 - 10.255.255.255

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11
Q

What is the range of Class B private address range?

A

172.16.0.0 - 172.31.255.255

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12
Q

What is the range of Class C private address range?

A

192.168.0.0 - 192.168.255.255

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13
Q

Can a router be configured with one IP or a block of public IP addresses?

A

Yes

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14
Q

What does NAT stand for?

What does NAT do?

Where is NAT used?

A

Network Address Translation

Translates between public and private IP’s

Used in Routers

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15
Q

Does a proxy server need or not need a public IP on the external-facing interface?

A

Need

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16
Q

What is is Class D IP Addressing used for?

What’s the range?

A

Multicasting

224.0.0.0 - 239.255.255.255

17
Q

What range is 224.0.0.0 - 239.255.255.255 used for?

What Class letter is it?

A

Multicasting

D

18
Q

What is is Class E IP Addressing used for?

What’s the range?

A

Experimental Use and Testing

240.0.0.0 through 255.255.255.255

19
Q

What range is 240.0.0.0 through 255.255.255.255 used for?

What Class letter is it?

A

Experimental Use and Testing

E

20
Q

What’s a loopback address used for?

What range is it?

A

Checks TCP/IP is correctly configured on local host

127.0.0.0 - 127.255.255.255

21
Q

Does a loopback interface require a physical interface to function?

22
Q

What is every IP host’s default loopback address?

23
Q

What name is the loopback address associated with?

24
Q

What is 0.0.0.8 typically used for?

A

A client seeking DHCP lease

25
Q

What is 255.255.255.255 used for?

A

BROADCAST to local network when local network is not known

26
Q

What are
192.0.2.0/24
198.51.100.0/24
203.0.113.0/24

used for?

A

Set aside for documentation and examples

27
Q

What are factors to know when planning an IPv4 network addressing scheme? (4)

(Think simple)

A

Number of IP networks and subnetworks

Number of hosts per subnet

Network ID must be valid public/private range

Network ID must be unique on the internet

28
Q

What 2 problems does Classless Addressing solve over Classful Addressing?

A

Class B addresses becoming scarce

Exponential growth in Internet routing tables

29
Q

What does CIDR mean?

A

Classless Inter-Domain Routing

30
Q

How does CIDR work? (2)

A

Route Aggregation (Supernetting)

Flexible Subnetting

31
Q

What does VLSM stand for?

A

Variable Length Subnet Masking

32
Q

What does VLSM do?

A

Allows network designer to allocate ranges of IP addresses to subnets that match the predicted need more closely

Right range for the right segment of the network!