Chapter 4 152-160

Question 1

What is IGMP

Answer 1

Internet group management protocol

Question 2

What does IGMP do?

Answer 2

Ipv4 only, network layer & manages multicasting

Question 3

what is multicasting?

Answer 3

transmission that allows one node to send data to a defined group of nodes

Question 4

how is IGMP used

Answer 4

telecasting over the internet, video conferencing

Question 5

how is IGMP different?

Answer 5

usually broadcast is node to node, IGMP is point to multipoint

Question 6

What is ARP

Answer 6

address resolution protocol

Question 7

what does ARP do?

Answer 7

network layer, Ipv4, gets the physical address of a host or node, Maps it and creates a data base that maps the address to the host IP address.

Question 8

What’s the difference between dynamic ARP and static ARP

Answer 8

dynamic requests are when the ARP is not in the data base already, static are ones that are already found

Question 9

How can ARP help troubleshoot?

Answer 9

get an ARP table, and find the id of machines who are trying to use the same IP

Question 10

What is ICMP

Answer 10

internet control message protocol

Question 11

What does ICMP do?

Answer 11

network layer protocol that reports back on the success or failure of data delivery

Question 12

How is ICMPv6 different?

Answer 12

ICMPv6 combines ICMP, IGMP, and ARP

Question 13

What are the two kinds of addresses a network has?

Answer 13

physical (MAC layer or hardware) and logical (network layer)

Question 14

Where does a physical address come from?

Answer 14

it is assigned to the NIC (network interface card)

Question 15

where do logical addresses come from?

Answer 15

logical is assigned but must follow rules

Question 16

what is an IP address?

Answer 16

A unique 32 bit number

Question 17

How is an IP address divided

Answer 17

4 sets of 8 bits separated by periods – four octets

Question 18

what is binary and dotted decimal notation?

Answer 18

the most common way of showing an ip address. Binary is the 00100111

Question 19

What is a subnet mask

Answer 19

the device’s mask, 32 bit number along with the IP tells the network which computer it is

Question 20

Why do you need subnets?

Answer 20

make better use of the limited # of ip addresses

Question 21

How is Ipv6 different than Ipv4?

Answer 21

V4= 4x8 bit fields for a total of 32 bits v6= 8 , 16 bit fields x 4 for a total of 128 bits

Question 22

why is ipv6 better?

Answer 22

4billion x 4 billion x 4 billion more ip addresses

Question 23

what can these better IP addresses be used for?

Answer 23

every device can have its own address for security

Question 24

what is a unicast address?

Answer 24

a single interface on a device – one workstation

Question 25

What is a multicast address?

Answer 25

one address represent multiple workstations

Question 26

what is an anycast address?

Answer 26

not assigned to hosts or workstations, they search for all routers in an ISP, so that the message can go quicker

Question 27

what is a format prefix?

Answer 27

attached the the beginning of each transmission saying what kind of address it is, unicast, multicast etc.

Question 28

How do ISPs get ip addresses?

Answer 28

internet service providers are given ranges of IP from the government

Question 29

why should you avoid assigning ip addresses manually?

Answer 29

human error might cause duplication

Question 30

manually assigned ip addresses are called

Answer 30

static ip addresses

Question 31

automatically assigned ip addresses are called

Answer 31

dynamic ip addresses

Question 32

What is the most common way to create dynamic ip addresses?

Answer 32

DHCP dynamic host configuration protocol