Unit 5 TCP/IP

Question 1

• Written as a subscript to a number

Answer 1

Radix

Question 2

Radix for Decimal

Answer 2

10

Question 3

Radix for Binary

Answer 3

2

Question 4

Radix for Hexadecimal

Answer 4

16

Question 5

is always furthest to the right

Answer 5

LSD

Question 6

is always furthest to the left

Answer 6

MSD

Question 7

Place holder is a

Answer 7

Zero

Question 8

A logical numeric address assigned to every computer, printer,
switch, router or other device that is part of a TCP/IP-based network

Answer 8

IP address

Question 9

Numbers written in form of 32 bits in four groups of eight binary
components referred to as

Answer 9

octets

Question 10

 Address format to represent a binary IP address in a more user-friendly
manner is referred to as

Answer 10

dotted decimal notation

Question 11

205.112.45.60 what kind of IP address

Answer 11

dotted decimal notation

Question 12

 Largest octet number is

Answer 12

255

Question 13

 Composed of network number and host number

Answer 13

IP address

Question 14

Identifies specific network
 Must be assigned by IANA or authorized representative

Answer 14

Network number

Question 15

ID’s specific host or node
 Assigned by local network administrator

Answer 15

Host number

Question 16

 Each IPv4 address belongs one of five classes of IP addresses
depending on the number in the first

Answer 16

octet

Question 17

First three classes - A, B and C - used by

Answer 17

network administrators

Question 18

Other two classes, D and E, are

Answer 18

reserved

Question 19

o Used for large networks
o Decimal addresses 1-126 in first octet
o Zero (0) is the first binary bit of the first octet
o Last 23 bits identify host or node number
o 126 class A networks with 16,777,214 hosts on each network
o 0 and 127 reserved for special purpose; 127 is special number called
loopback address

Answer 19

Class A

Question 20

o Used for intermediate sized networks
o Decimal addresses 128-191 in first octet
o First two binary bits (10) of first octet identify Class B address
o Next 14 bits, identify network number
o Last sixteen bits (2 octets) identify host or node number
o About 16,384 possible Class B networks with potentially 65,534 hosts on
each network

Answer 20

Class B

Question 21

o Used for small networks
o Decimal addresses 192-223 in first octet
o First three binary bits (110) of first octet identify Class C address
o Next 21 bits, identify network number
o Last eight bits (1 octet) identify host or node number
o About 2,097,152 Class C networks with 254 possible hosts or nodes on
each network

Answer 21

 Class C

Question 22

o Reserved for multicast (designated recipients) addressing
o Decimal addresses 224-239 in first octet
o First four binary bits (1110) of first octet identify Class D address and
together with the rest of address, identify network number
o Multicast is a membership addressing function that has no host field.

Answer 22

 Class D

Question 23

o Reserved for research and development
o Decimal addresses 240-254 in first octet
o First four binary bits (1111) of first octet identify Class D address and,
together with rest of the address, identify network number
o Octet value 255 is reserved for special use.

Answer 23

 Class E

Question 24

 Logical division of network of
connected network devices based on IP
address
 Separate and identifiable portion of an
organization’s network, typically
arranged on one floor, building or
geographical location
 Network within a network

Answer 24

Subnetting

Question 25

 Involves dividing the network into smaller portions called subnets  Applies to IP addresses because borrowing bits from the host portion of the IP address  IP address then has three components - the network part, the subnet part and, the host part  Create a subnet by logically grabbing last bit from network component of address and use it to determine number of subnets required

Answer 25

Subnetting

Question 26

 Class C address normally has 24 bits for the network address and

Answer 26

eight for the host

Question 27

 Borrow left-most bit of the host address and declare it as

Answer 27

identifying the subnet

Question 28

subnetting: If bit is a 0, then that will be

Answer 28

1 subnet

Question 29

Subnetting: If the bit is a 1 that would be

Answer 29

second subnet

Question 30

32-bit number used to differentiate network component of IP address by dividing IP address into network address and host address Indicates how many bits are being “borrowed” from host component of IP address

Answer 30

Subnet masks

Question 31

subnet masking: represents network number

Answer 31

255

Question 32

adapts the concept of subnetting to entire Internet Can aggregate networks into larger supernets Supernetting, where principles of subnetting are applied to larger networks Written out in network/mask format, where mask is tacked onto network address in form of number of bits used in mask

Answer 32

 Classless Internet Domain Routing (CIDR)

Question 33

Used when subnetting a subnet Any one subnet can be broken down into further subnets by indicating the Makes IP addressing more efficient by allowing each subnet to have a different number of hosts results in reducing the number of wasted addresses proper?

Answer 33

Variable Length Subnet Masking (VLSM)

Question 34

 Not all IP addresses are available; some are used for special purposes  Any IP address ending in 255 is special broadcast address  Other addresses are used for special signaling, including o Multicast routing mechanisms o Limited broadcasts sent to every host, but limited to the local subnet o Directed broadcasts first routed to a specific subnet, and then broadcast to all hosts on that subnet

Answer 34

Private IP addresses

Question 35

10.0.0.1 to 10.255.255.255

Answer 35

: Provides a single Class A network of addresses

Question 36

172.16.0.1 to 172.31.255.254

Answer 36

: Provides 16 contiguous Class B network addresses

Question 37

192.168.0.1 to 192.168.255.254

Answer 37

: Provides up to 216 Class C network addresses

Question 38

Only portion of “172” and “192” address ranges are designated for

Answer 38

private use

Question 39

All addresses in range 127.0.0.0 up to 127.255.255.255 for loopback testing 127.0.0.1 is loopback address used in almost all cases

Answer 39

Loopback Addresses

Question 40

Addresses in the range 169.254.0.0/16 are auto-assigned by host (to itself) if not configured with static IP and is unable to obtain a DHCP lease Are auto-assigned; should not be used for private networks and statically configured on hosts

Answer 40

Internet Protocol Version 6 (IPv6)

Question 41

New version of Internet Protocol, replacing IPv4 * Increases IP address size from 32 bits to 128 bits * 128-bit number supports 2128 values, or 340,282,366,920,938,463,463,374,607,431,768,211,456 possible IP addresses * Eliminates need for CIDR and network mask as used in IPv4

Answer 41

IPv6