Week 1 Flashcards
(10 cards)
Open Systems Interconnection (OSI) model
OSI model breaks the data communication process into discrete layers.
Organization for Standardization (ISO)
Developed the OSI reference model to promote understanding of how components in a network system work.
Does this by separating the function of hardware and software component into 7 discrete layers.
The 7 OSI layers
A Penguin Said That Nobody Drinks Pepsi
7: Application
6: Presentation
5: Session
4: Transport
3: Network
2: Data Link
1: Physical
7-5: Application Protocols(Web, email, file, transfer..), Stateful/Application layer Security Appliance, Multilayer Switch.
4: Segment
3: Datagram, IP Address, Basic Firewall, Router
2. Frame, MAC address/EUI, Bridge, Switch
1. Transceiver, Cable, Media Converter, Hub
Configure SOHO(Small office/Home office) Networks
SOHO Routers Networks of different sizes are classified in different ways. Network in single location = LAN. Can be residential networks with a few computers or a enterprise with hundreds of workstations. SOHO is a LAN with small number of computing hosts that rely on single integrated appliance for local and internet connectivity. Networks with different geographical locations are called WAN’s.
SOHO router one of its primary functions is to forward traffic between the LAN and WAN.
Ethernet standards
Ethernet Dominates the wired LAN product market. Popular based on ease of installation and upgradability.
Large and small networks use Ethernet technology to provide both backbone and end-user services.
Wide deployment of Ethernet, will need to undoubtedly be required to manage and troubleshoot ethernet networks.
Ethernet Data Transmission
All networks uses electromagnetic radiation. Which means transmitting signals as electric current, infrared light, or radio waves.
Electromagnetic radiation forms a carrier wave with a given bandwidth or range or frequencies.
Signal is transmitted over the wave by modulation and encoding schemes. Example is encoding between low and high voltage states, making use of the wave called amplitude.
Ethernet Standards
Provide assurance that network cabling will meet the bandwidth requirements of applications. Standards specify the bit rate that should be achieved to supported distance limitations.
Media Access Control(MAC) and Collision Domains
MAC refers to the methods a network uses to determine when nodes can communicate on shared media to deal with possible problems. Like 2 devices attempting to communicate simultaneously.
100BASE-TX Fast Ethernet Standard
The fast ethernet standard uses the same CSMA/CD protocol as 10BASE-T with higher frequency, raising bitrate from 10Mbps to 100Mbps.
100BASE-TX refers to fast ethernet working over Cat 5 (or better) twisted pair copper cable with maximum supported link length of 100 meters (328 feet).
Gigabit Ethernet Standards
Builds on the standards defined for fast Ethernet to implement rapes of 1000 Mbps (1Gbps). Over copper wire. 1000BASE-T, working over Cat 5e or better. Gigabit Ethernet does not support hubs, only implemented using switches.
