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Network #5
From 3.1 [Network connecting devices]
| Term | Definition |
|---|---|
| Network connecting devices | Connect hosts to make a network / connect networks to make an internet. Works in different layers of the internet model |
| Repeaters/Hubs - Layer 1 | Amplify and re-time network signals so LANs can extend to greater lengths. Can have single or multiple port repeaters, known as hubs. Binary only. Doesn't segment the network |
| Segmentation | Breaking down a heavily populated network into smaller segments, or collision domains, populated by fewer nodes |
| Collision domain | Devices that "see" the traffic of other devices are on the same collision domain |
| Bridge - Layer 2 | Uses MAC/physical addresses to choose whether to forward info. Breaks a large network into smaller segments. Extends a network by acting as a repeater. Reduces network traffic + frame collisions |
| Ethernet switch - Layer 1 + 2 | Switches data from incoming ports (interfaces) to outgoing ports. Works like a repeater and bridge |
| Broadcast storm | When 2+ stations engage in the transmission of excessive broadcast traffic |
| Contention | When machines must share a wire and compete for available bandwidth with other machines |
| Micro segmentation | Prevents communications between just two computers from being broadcast to every computer on the network or segment |
| Router - Layer 3 | A physical or virtual internetworking device that forwards data packets between computer networks. Connects two incompatible networks. Creating signal in L1, checking MAC/physical address in L2, and checking IP addresses in L3. Connects 2+ networks |
| Gateway - Layer 7 | Combinations of networking hardware and software to connect two dissimilar networks with different formatting, protocols, architecture(like a phone & the internet) |
| Disadvantages of a Switch | Network connectivity problems can be difficult to trace. Broadcast traffic on Layer 3 may be troublesome |
Created by:
jolly_n4
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