CS 350Chapter-5

Conn. devices

Description

Hub Connect multiple network segments, doesn’t recognize frame, broadcast to all ports

Repeater (hubs)

Reamplify/regenerate signals and forward to all ports

Modem (POT/DSL/Cable)

Digital data analog carrier digital data the for receiver

NIC Provide the physical/electrical/electronic connection

Transceiver Allow NIC/networking device to connect to a different type of media. Ether (100Base-TX) Switch + fiber transceiver to each port + fiber-optic cable+ fiber (100Base-FX)switch

Bridge Connect two similar network segments, keep traffic separated, break up collision domain, software based

Basic switch(layer 2 switch;Layer3=router)

Connect multiple network segments, recognize frame, know MAC addresses and direct to correct port, otherwise flood to all ports w/o receiving port

Conn. devices

Description

Multilayer Switch

Switching and routing. Packet switching by using application-specific integrated circuit (ASIC) hardware; router uses a microprocessor

Content Switch

Load balancing, encryption/decryption

Wireless AP Wireless hub/switchBasic router(layer 3 switch)

Connect many, sometimes disparate, network segments, packet switching/filtering, patch selection

Basic firewall

Blackbox/software on a server/router between Internet (public side) and your network(private side)Or, Internet– firewall—DMZ (demilitarized zone, like web and email server)—firewall– internal network

Conn. devices

Description

DNS server Domains, record types, DNS queryIDS/IPS Intrusion detection or prevention system

Bandwidth ShaperChannel Service Unit/Data Service Unit

CSU/DSU, connect transmission medium like a T1 line to a router

DHCP server Assign IP address to hosts using bootP protocol (port68, port 67). Client gets a IP address, a subnet mask, a lease time, the IP address of the DHCP server, default gateway, DNS server IP address/ the domain name …

How many broadcast domains and collision domains?