Chapter 7 - Introduction to TCP/IP

Question 1

the is the OSI model and the TCP/IP model. which one is the most popular today?

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Answer 1

the TCP/IP model

Question 2

make a parallel between the layers of the TCP/IP model and the OSI model

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Answer 2

application - application, presentation, session
host to host - transport
internet - network
network access - data link, physical

Question 3

what layer will you find ICMP, ARP, and RARP protocols?

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Answer 3

internet

Question 4

where will you find the token ring protocol?

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Answer 4

network access

Question 5

tell me the two transport protocols found at the host to host layer

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Answer 5

TCP

UDP

Question 6

what does DNS do?

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Answer 6

resolves the URL of a webpage to an IP address so communication can happen

Question 7

tell me the two things for securing HTTPS connections

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Answer 7

secure socket layer SSL

transport layer security TLS

Question 8

what is SMB?

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Answer 8

server message block, developed by microsoft (like RDP), its functions like FTP but with a few more options

Question 9

how many logical ports are there on a computer?

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Answer 9

65,536

Question 10

of all the logical ports on a computer, which ones are the well-known ports?

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Answer 10

0 - 1023

Question 11

which ports are the registered ports?

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Answer 11

1024 - 49151

Question 12

which ports are free to be used by application vendors?

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Answer 12

49152 - 65535

Question 13

tell me 3 protocols that operate on UDP (not connection oriented)

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Answer 13

SNMP
DHCP
DNS (can do TCP as well)

Question 14

how many bits in an IPv4 address?

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Answer 14

32

Question 15

IPv4 addresses have a ____ ____ notation

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Answer 15

dotted decimal

Question 16

each IP address is made up of two components. tell me what they are.

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Answer 16

network ID

host ID

Question 17

all host addresses on a network must be unique, true or false?

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Answer 17

true

Question 18

there are 5 classes of IPv4 addresses. tell me the ranges for the 1st octet for each class AND the default subnet mask

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Answer 18

A:    1-127         255.0.0.0
B:    128-191     255.255.0.0
C:    192-223   255.255.255.0
D:    224-239   n/a
E:    240-255   n/a

Question 19

4 pieces of info typically provided by DHCP server to clients.

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Answer 19

IP addresses
subnet mask
default gateway
DNS server address

Question 20

what’s the alternative to DHCP addressing?

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Answer 20

static IP addressing

Question 21

how many hosts in class c?

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Answer 21

65,536

Question 22

what is APIPA?

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Answer 22

automatic private ip addressing, for automatic configuration of hosts that cannot reach a DHCP server

Question 23

IPv6 address has how many bits?

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Answer 23

128

Question 24

tell me the 3 sections, left to right, of a IPv6 address structure

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Answer 24

global prefix
subnet
interface id

Question 25

how can you tell if an IP address is APIPA?

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Answer 25

starts with 169.254~~~~