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CCNA > 7. Intro TCP/IP Internet Layer, IPv4 Addressing, and Subnets > Flashcards

7. Intro TCP/IP Internet Layer, IPv4 Addressing, and Subnets Flashcards

1
Q

How many bits in an IPv4 Address?

A

32

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2
Q

What is Subnetting?

A

Manipulating the subnet mask to create subnetworks for network segments of different sizes

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3
Q

What is VLSM?

A

Variable-Length Subnet Mask

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4
Q

At what layer of the OSI reference model does IP operate?

A

Layer 3

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5
Q

At what layer of the TCP/IP stack does IP operate?

A

The Internet Layer

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6
Q

What is the term for a base 2 numbering system?

A

Binary

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7
Q

What is an Octet?

A

One of the four 8-bit fields in a binary IPv4 address.

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8
Q

What is the largest number that can be written with 8 bits?

A

255 - Expressed in binary as 11111111

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9
Q

What are the two parts of an IPv4 address.

A
  1. The Network Address Portion (Network ID)
  2. The Host Address Portion (Host ID)
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10
Q

This field in an IPv4 header provides information on the desired quality of service.

A

Service Type

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11
Q

This field in an IPv4 header limits the lifetime of a packet.

A

TTL (Time to Live)

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12
Q

This field in an IPv4 header specifies the 32-bit binary value that represents the IPv4 address of the sending endpoint.

A

Source Address

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13
Q

This field in an IPv4 header specifies the 32-bit binary value that represents the IPv4 address of the receiving endpoint.

A

Destination Address

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14
Q

What is the IPv4 host value range for Class A Networks

A

Between 1 and 126 in the first Octet.

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15
Q

What is the IPv4 host value range for Class B Networks?

A

Between 128 and 191

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16
Q

What is the IPv4 host value range for Class C Networks?

A

Between 192 and 223

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17
Q

What is the IPv4 host value range for Class D Networks?

A

Between 224 and 239

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18
Q

What is the IPv4 host value range for Class E Networks?

A

Between 240 and 255

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19
Q

Which Class of IPv4 Network is dedicated to Multicast?

A

Class D

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20
Q

If a Subnet mask had a binary 1 in a bit position, the corresponding bit in the address is part of the _____ ID.

A

Network ID.

21
Q

If a Subnet mask had a binary 0 in a bit position, the corresponding bit in the address is part of the _____ ID.

A

Host ID

22
Q

List four problems with Flat Network Design

A
  1. Security
  2. Troubleshooting
  3. Address Space Utilization
  4. Scalability.
23
Q

While Subnetting, what is the formula to determine the number of subnets gained.

A

Number of Subnets = 2<em>S</em> (Where S is the number of bits that are borrowed.)

24
Q

While Subnetting, What is the formula to determine the number of hosts per subnet?

A

Number of Hosts = 2<em>h</em> - 2 (Where h is the number of host bits that are remaining after bits are borrowed)

25
Q

Go to IPv4 Subnetting Practice and complete 5 problems

A

Did you get them all right on the first try?

26
Q

What is the purpose of VLSM?

A

Variable-Length Subnet Masks allow you to use more than one subnet mask within a network to efficiently use IP addresses.

27
Q

What does NAT stand for?

A

Network Address Translation

28
Q

What does CIDR stand for?

A

Classless Interdomain Routing

29
Q

What is the range of IPv4 addresses in the Public Class A

A
  1. 0.0.0 - 9.255.255.255
  2. 0.0.0 - 126.255.255.255
30
Q

What is the range of IPv4 addresses in the Public Class B

A
  1. 0.0.0 - 172.15.255.255
  2. 32.0.0 - 191.255.255.255
31
Q

What is the range of IPv4 addresses in the Public Class C

A
  1. 0.0.0 - 192.167.255.255
  2. 169.0.0 - 223.255.255.255
32
Q

What is a LIR

A

Local Internet Registry.

  • Businesses and home internet users receive their public IP from their LIR. (Typically their Internet Service Provider)
33
Q

What is a RIR

A

Regional Internet Registry

LIRs (ISPs) obtain IP address pools from their Regional Internet Registry.

34
Q

Private IPv4 Address Range for a Class A Network

A

10.0.0.0/8

35
Q

Private IPv4 Address Range for a Class B Network

A

172.16.0.0/12

36
Q

Private IPv4 Address Range for a Class C Network

A

192.168.0.0/16

37
Q

What is the Local Broadcast Address?

A

255.255.255.255

38
Q

What is a Local Broadcast Address used for?

A

To communicate with all the devices on the local network.

A local broadcast is never routed beyond the local network or subnet.

39
Q

What is a Directed Broadcast Address used for and how is it different than a Local Broadcast Address?

A

Allows communication to all hosts in that network.

It is the highest address in the network range

A Directed Broadcast Address can be routed beyond the local network or subnet.

40
Q

What is the Directed Broadcast Address?

A

It is the highest address in the network range.

41
Q

What is a Local Loopback Address?

A

Any IPv4 address in the 127.0.0.0/8 range.

42
Q

What is a Local Loopback Address used for?

A

Testing a device’s network software and hardware.

43
Q

What is an Autoconfiguration IPv4 Address?

A

An address in the 169.254.0.0/16 range.

44
Q

What is an Autoconfiguration IPv4 Address used for?

A

Assigned to a host when neither a statically nor a dynamically configured IP address is found on startup.

45
Q

What is an All Zeros Address

A

0.0.0.0

46
Q

What is an All Zeros Address used for?

A

Indicates the host in “this” network and is used only as a source address.

47
Q

Command to display all current TCP/IP network configuration values on a Windows computer.

A

ipconfig

48
Q

Command to obtain the IPv4 address and other information on a Apple MAC.

A

ifconfig

CCNA (13 decks)

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