IS 4440 : Exam 1

1500 bytes = _________

frame

what is QoS? provide an example.

quality of service rules. if the network is too busy, provide priority voice ie phone calls.

what is the primary function of a router

separate networks

what stage of the OSI is for TCP?

transport

what does UDP stand for? how does it differ from TCP?

-UDP user datagram protocol : connectionless, broadcast, extremely fast -TCP is connection-oriented, requires a session, prim and proper

What is TTL ? What does it stand for? (packets)

-time to live -mathematical value to packet. Every time the router connects to the internet the packet subtracts one from its TTL.

what does <syn> , <ack> , <fin> indicate in TCP? how is a session opened and closed?

1. <syn> synch to source you are established a session with 2. <ack> acknowledge 3. <fin> finish -the communication of the two results in a "three way open" established session -four way close

what is the TCP/IP model, list the four stages

1. link 2. internet 3. transport 4. application

list the 7 stages of the OSI model

1. physical 2. data-link 3. network 4. transportation 5. session 6. presentation 7. application

what are the 6 stages of a frame? what stage is comprised of packets?

1. preamble 2. destination mac 3. source mac 4. type 5. payload (packets) 6.pad

the Transport Layer 1. what is the main protocol? 2. what does this protocol do? 3. how does it work?

1. transmission control protocol (TCP) 2. Ensures a connection is established and the same data is sent 3. establish a session, sending a <syn> packet

ARP what does it stand for, what is it?

address resolution protocol.

what is the primary function of a switch?

exist within network segments, knowns what port to send traffic on

what is the difference between IP and MAC address?

mac addresses exist on a single network segment, but cannot go onto the internet

Version, IHC, TOSm length, ID, flags, Protocol, and F.O are fields in _________ in what stage of the OSI?

packets/payload, in the data/network. transportation.

subnet is a layer 3 logical separation of network. how does it work?

set rules for users ie guest wifi vs corporate wifi, the separations within the subnet become their own network segments.

user device - wiAiP switch - switch- router- internet what stages are a network?

user - switch

provide an example of a consumer facing product that uses UDP?

video conferencing, Skype.

VLAN is layer 2 network : what does is stand for what is it?

virtual location area network : setting rules to use various ports assigning different networks