WNE #3

Question 1

Open Systems Interconnection OSI Model

Answer 1

1. Physical - defines physical specifications of the network, data: bits
2. Data Link - where LAN and ethernet are defined, concerned with data delivery, data: frames
3. Network - responsible for determining the best route to a destination, data: packets
4. Transport - responsible for transporting data, data: Segment
5. Session - responsibility of establishing, maintaining, and terminating sessions
6. Presentation - interacts with session and application formats data
7. Application - interacts with the presentation layer
   only communicate between adjoining layers, data: Protocol Data Unit (PDU)

Question 2

Domain Name System DNS

Answer 2

resolves host names to IP addresses

Question 3

Hyptertext Transfer Protocol HTTP

Answer 3

primary protocol used to transmit data across the internet for web pages

Question 4

file transfer protocol ftp

Answer 4

used to transfer files to and from an FTP server

Question 5

trivial ftp TFTP

Answer 5

used to transfer smaller files

Question 6

Dynamic host configuration protocol DHCP

Answer 6

method of assigning TCP/IP config info to clients

Question 7

lightweight directory access protocol LDAP

Answer 7

used to query a directory service

Question 8

post office protocol POP3

Answer 8

email protocol used to retrieve email

Question 9

simple mail transfer protocol SMTP

Answer 9

email protocol used to send email

Question 10

internet message access protocol IMAP

Answer 10

used to receive emails messages

Question 11

simple network management protocol SNMP

Answer 11

used to manage network devices such as routers and managed switches

Question 12

server message block SMB

Answer 12

file transfer protocol used on microsoft networks

Question 13

simplex

Answer 13

session layer, data is only sent one way

Question 14

half duplex

Answer 14

data can be sent both ways but only one way at a time

Question 15

full duplex

Answer 15

data can be sent and received at the same time

Question 16

transmission control protocol TCP

Answer 16

provides guaranteed delivery of data

Question 17

user datagram protocol UDP

Answer 17

provides a best effort of delivering data

Question 18

IPv4

Answer 18

addressing protocol using 32 bit addresses

Question 19

IPv6

Answer 19

addressing protocol using 128 bits

Question 20

address resolution protocol

Answer 20

resolves IP addresses to the physical address or the Media Access Control (MAC) address

Question 21

internet group multicast protocol IGMP

Answer 21

used for multicasting traffic

Question 22

internet control message protocol ICMP

Answer 22

used for error messages and diagnostic reporting

Question 23

internet protocol security IPSec

Answer 23

security protocol used to secure IP traffic

Question 24

routing information protocol RIP

Answer 24

used by routers in internal networks

Question 25

open shortest path first OSPF

Answer 25

used by routers to communicate with each other more advanced than RIP

Question 26

Logical link control LLC IEEE 802.2

Answer 26

interacts directly with the network layer

Question 27

media access control MAC IEEE 802.3

Answer 27

defines how packets are placed onto the physical media at the Physical layer

Question 28

MAC address

Answer 28

physical address, A4-BA-DB-….

Question 29

Point to Point Tunneling Protocol PPTP

Answer 29

commonly used with virtual private networks

Question 30

Layer 2 Tunneling Protocol (L2TP)

Answer 30

another protocol used with VPN’s

Question 31

token ring

Answer 31

computers can only communicate when they have a token

Question 32

frame relay

Answer 32

WAN technology, data is converted into frames and transferred over permanent virtual circuits

Question 33

encapsulation

Answer 33

where data form higher layers is encapsulated into lower areas, packets grow as they go down the chain

Question 34

TCP/IP Model

Answer 34

Application Layer:7,6,5
Transport Layer:4
Internet Layer:3
Link Layer:2,1