Transcript LTEC4550_Assignment3_Whitaker

Network Equipment
Assignment 3
LTEC 4550
Aaron Whitaker
HUB
Data for 10.0.0.107
Data exits all ports
•Exists at layer 1 on the OSI model
•All connected devices share:
•Bandwidth
•Broadcast domain
•Collision domain
•Only one device may transmit at a time
•Hubs and a cheap method of adding ports, typically sub-$100 for up to 16
ports
SWITCH
Data for 10.0.0.107
Data exits port
which connects to
destination
network/computer
•Typically exists at layer 2 on the OSI model
•Allocates traffic from one network segment to another
•Switch splits traffic and sends it to different locations
•Most switches maintain a MAC address table to help speed up future
connections
•Prices on switches vary widely, from about $30 for a cheap 4 port switch
though $8000 plus for Cisco Catalyst switches
ROUTER
Data for 10.0.0.107
Data forwarded to
proper network
•Exists at layer 3 on the OSI model
•Forwards packets to different network segments
•Can only interface with one network protocol
•Again, prices vary widely depending on functionality. From $89 to $10000
plus
BRIDGE
Data for 10.0.0.107
Data exits port
which connects to
destination
segment/computer
•Exists at layer 2 on the OSI model
•Connects traffic from multiple network segments together
•Will not forward traffic if destination is on the same segment
•Honestly, I couldn’t find accurate pricing as this equipment seems fairly
rare
GATEWAY
Data for 10.0.1.107
From 10.0.0.100
Data exits port which
connects to
destination network
•Exists at layers 4-7 on the OSI model
•A device or program which allows for communications between devices
which use different protocols
•Can operate as part of a router, switch, or as a program on a computer
•On a typical IP network, computers send packets destined for a different
network to its default gateway
•Protocol gateways are designed specifically to translate one protocol to
another. Example: voice over IP gateway
•Most dedicated gateways I found were in the $5000-$10000 range
FIREWALL
Undesirable traffic headed to
network or server is stopped by
firewall
•Typically installed inside a trusted, secure network
•Can be a dedicated device or part of a multi-function device
•Many operating systems include a basic firewall to prevent intrusion
•Firewalls pricing is quite variable depending on features. I found several
basic dedicated firewalls for around $1000, but they go as high as $70000
when you add content filtering, anti-virus, packet filtering, etc.
WIRELESS AP
Device with Wi-Fi
card
Sends packet to
wired network
resource.
WAP takes the radio
communication and
translates it for use
with on the wire.
•Connects devices on a Wi-Fi network to a wired network
•Commonly used in home wireless networks
•In large-scale deployments, many APs are used which allows users to
wander freely with wireless devices. This allows for greater flexibility
•Many companies have developed appliance which allow admins to control
many APs using centralized policies
•Prices vary with home based units at around $80, and light-weight
corporate APs costing around $700