Ip And Addressing

Front 1

Address size IPv4 vs. IPv6

Back 1

32 bits vs. 128 bits

Front 2

Packet size IPv4 vs. IPv6

Back 2

576 bytes req. (fragmentation optional).

1280 bytes req. (No fragmentation)

Front 3

Header size IPv4 vs. IPv6

Back 3

(IPv4)

20-60 bytes.
Includes checksum.

(IPv6)
40 bytes.(extension headers used for opt. data)
Does not include checksum.

Front 4

Why is checksum not included in IPv6?

Back 4

Both transport-layer and data-layer computes checksum, the checksum in the network-layer can be regarded as redundant. It also reduces the work since the checksum needs to be recalculated at each router.

Front 5

Broadcast IPv4 vs. IPv6

Back 5

(IPv4) Yes

(IPv6) No

Front 6

Multicast IPv4 vs. IPv6

Back 6

Yes

Yes

Front 7

IPsec IPv4 vs. IPv6

Back 7

Optional external

Required

Front 8

NAT

Back 8

Network Address Translation

Used in IPv4 that allows multiple devices connect to a public network using the same public IPV4 address.

Allows you to connect a private network to the internet without obtaining registered addresses for every host.

Front 9

Link-local

Back 9

(IPv6 and IPv4)

A network address that is intended and valid only for communication within a network segment.

Are not guaranteed to be unique beyond a single network segment. Ruters does therefore not forward packets with link-local addresses. Every IPv6 enabled host has a link-local address, but do not need a Unique-local.

Front 10

Unique-local

Back 10

(IPv6)

Is the approx conuterpart of IPv4 private address. Are avaliable for use in private networks, but are not routable in the global IPv6 internet.

Front 11

Can a network interface have both unique local and link-local?

Back 11

Yes

Front 12

Network address

Back 12

Identifies the subnet of a host

Front 13

Netmask

Back 13

Is used to divide an IP address into subnets and specify the networks avaliable hosts. (Ex. 255.255..255.128)

If this mask designates(betecknar) a subnet within a larger network, it is also called the subnet mask.

Front 14

Broadcast address

Back 14

A message sent to a BC-address is typically recieved by all network attached hosts.

Front 15

Calculate the network address

Back 15

Use the bitwise AND operator of the IP and netmask.

Front 16

Calculate the broadcast address

Back 16

Do a binary inversion of the netmask. Do a bitwise OR on the network address and the inverted netmask.

Front 17

Calculate the number of hosts in a network with a specific prefix

Back 17

Ex, /24

2^(32-24)-2

Front 18

Jumbo payload option

Back 18

Can be used in IPv6.

The IPv6 Hop-by-hop extension header can contain the Jumbo payload option, which
allows one to send datagrams of length up to 4GB.