Lab 5 : Networking Devices

920 WordsFeb 15, 20174 Pages
HWD101-Lab 5 – Networking Devices There are four major networking devices. They are: Hubs, Switches, Routers, Bridges 1) How does a hub work? Ans: The common connection point for devices in a network is called hub and are usually used to connect sections of a LAN. A hub contains many ports. When a packet arrives at one port, it is copied to the other ports so that all parts are visible to the LAN. A hub just takes the data that comes into a port and transmits it out all the other ports. In a hub, a frame is passed to every one of its ports. It doesn 't matter that the frame is only destined for one port. The hub has no way of differentiate which port a frame should be sent to. So it passes it to every port to ensure that it reaches its…show more content…
It works at the logical level that is the layer 2 in the OSI model, which means that it can filter frames so that it passes only that data whose destination address matches to a machine located on the other side of the bridge. It is also used to segment a network, holding back the frames intended for the local LAN while transferring those meant for other networks. This reduces traffic on all networks, and increases the level of privacy. 5) There are 7 layers to the OSI Model. Name them, and give some protocols that exist at each layer, as well as a physical device that ‘exists’ at each layer. Some layers may NOT have a device, so in this case, write in NA (not applicable) # Name Protocols that ‘exist’ at this layer Devices that ‘exist’ at this layer Name of the Datagram 7 (A)pplication HTTP, FTP, SNMP, TELNET, DHCP, IMAP, POP3, DNS NA Data 6 (P)resentation TLS , SSL NA Data 5 (S)ession Netbios and PPTP NA Data 4 (T)ransport TCP, UDP NA Segment 3 (N)etwork IP, ARP, IPSec, Appletalk and ICMP Routers Packet 2 (D)atalink PPP, Ethernet and ATM Switch or Bridge Frame 1 (P)hysical Ethernet, USB , Bluetooth, IEEE 8.2.11 Network Cards Bit 6) What is a broadcast domain? Any computer that is connected to a router is a member of the same broadcast domain. Ans: A broadcast domain is a rational division of a computer network, in which all nodes can reach each other by broadcast at the data link layer. It can be within the

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