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Network+ > 1.4 - IP Configuration > Flashcards

1.4 - IP Configuration Flashcards

1
Q

Explain Public IP vs. Private IP

A

Public IPs are licensed by IANA in three classes (A, B, C). Private IPs are non-routable IP’s that get subnetted to devices on a particular network.

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2
Q

What is the range of Class A subnets? How many networks do they provide? How many hosts per network?

A

Range is 0 through 126.255.255.255
Class A provides 126 networks
Class A provides 16,000,000 hosts per network

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3
Q

What is the range of Class B subnets? How many networks do they provide? How many hosts per network?

A

Range is 128.0.0.0 through 191.255.255.255
Class B provides 16,000 networks
Class B provides 65,000 hosts per network

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4
Q

What is the range of Class C subnets? How many networks do they provide? How many hosts per network?

A

Range is 192.0.0.0 through 223.255.255.255
Class C provides 2,000,000 networks
Class C provides 254 hosts per network

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5
Q

What is the range of Class D subnets?

A

224.0.0.0 through 239.255.255.255

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6
Q

What are the three non-routable IP address ranges?

A
  1. 0.0.0 - 10.255.255.255
  2. 16.0.0 - 172.31.255.255
  3. 168.0.0 - 192.168.255.255
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7
Q

What is the purpose of IP 255.255.255.255?

A

This is a broadcast address. Only to be used when sending broadcasts.

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8
Q

What is the purpose of IP 0.0.0.0?

A

This IP is unassigned and therefore not in use.

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9
Q

What is the loopback address range?

A

127.0.0.1 through 127.255.255.254

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10
Q

What is the APIPA address range?

A

169.254.0.1 through 169.254.255.255

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11
Q

What is a default gateway?

A

A gateway performs the address translation required for your private network to communicate with the public network. Usually your router.

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12
Q

What is Virtual IP?

A

A single IP address given “virtually” to a cluster of servers to improve the load on the server network. Makes a bunch of servers look like one big, fast server.

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13
Q

What is a subnet mask?

A

An 32-bit address broken into two parts. The Network ID, and the Host ID.

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14
Q

What is classful subnetting?

A

The simplest form of subnetting, using whole octets to identify the network IDs. Broken down into classes A, B, C, D, and E.

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15
Q

How is class A subnetted? (Network/Host bits, Address?)

A

8 network bits, 24 host ID bits, 255.0.0.0

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16
Q

How is class B subnetted? (Network/Host bits, Address?)

A

16 network bits, 16 host ID bits, 255.255.0.0

17
Q

How is class C subnetted? (Network/Host bits, Address?)

A

24 network bits, 8 host ID bits, 255.255.255.0

18
Q

What is class D reserved for?

A

Multicast

19
Q

What is class E reserved for?

A

Research

20
Q

Explain CIDR (classless subnetting)

A

Classless Interdomain Routing. Allows the subnet mask to use bits from preceding octets to increase or decrease network or host bits, respectively.

21
Q

How do you determine the “whack” or slash number for CIDR?

A

32, subtract number of borrowed.

22
Q

How do you determine the number of hosts for CIDR?

A

2 to the power of # of borrowed

example: /25 = 128 hosts

23
Q

What is VLSM?

A

Variable Length Subnet Mask. Allows you to subnet the subnet mask, per se.

24
Q

What is DHCP? What does it do?

A

Dynamic Host Configuration Protocol. Provides configuration information to clients while preventing address duplication. It leases addresses to clients from a scope of available addresses.

25
Q

What is the major difference with DHCPv6?

A

It works on ports 546 and 547

26
Q

What is static addressing?

A

Static addressing is manually configuring the IP address of a device when the IP needs to remain consistent. Such as printers and servers.

27
Q

What is APIPA?

A

Automatic Private IP Addressing. APIPA is used when the DHCP server is unavailable. It used the IP address range of 169.0.0.1 through 169.254.255.255

Remember, 169 = no internet for you!

28
Q

What is EUI64?

A

Extended Unique Identifier-64. Uses the MAC address of the device along with an additional 16 bits, while also inverting the 7th bit to create the 2nd half of an IPv6 address.

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