Fichas
Comp 2
Fichas del conjunto (37)
- 1The internet is a...Wide Area Network
Or
Local Area Network - 2ISP? IMAP severs? FTP? Switches?ISP - internet service provider
IMAP severs- used to send email
FTP- file transfer protocol
Switches - direct traffic within LAC - 3Star topologyNetwork configuration where nodes are added in modular fashion to central device
- 4Fault toleranceIf one computer dies, the rest will still work
- 5Network interference controller (NIC)Hardware that connects node to a network
- wired and wireless - 6A NIC has...- a unique MAC address
- user defined IP address
Mac - median access control - 7Ethernet and wifi regulate...Low level data transmission in LANS
- Ethernet via CAT5+ or fibre
- wifi via radio signals - 8SwitchingUsing a device to direct network traffic between nodes
- 9Access point-operates as a wireless hub broadcasting incoming signal to all wireless nodes
- 10Switching with wifiInfrastructure mode
- 11Repeater- used to prevent signal degradation and extend signal distance
- typically built into Ethernet switches - 12Router- used to connect nodes/computers/lans to internet
- 13ModemModulator/demodulator
- converts LAN traffic into a signal suitable for transmission to and from ISP - 14General requirements for network communication- a means to identify individual nodes/hosts
- a medium for data transmission
- routing devices
- protocols to regulate transmission - 15Low level protocolsFocus on LAN networking
- wifi operates at 2.4 GHz - 16Circuit switched network-a dedicated circuit created between two points
I.e. Old school telephone system - 17Packet switched network- data split into packets, stamped with destination address and routed there
- 18TCP/IP mid level protocol- packet switched "protocol suite" used in lans and internet
- 19TCP/IP uses 2 protocols1. Transmission Control Protocol
- manages data transfer between nodes
2. Internet protocol
- addresses packets - 20IPv44 byte address written in decimal
- must be unique in its network - 21OctetEach byte in an IP address is known as an octet
- 22What is the address space that can be created with 4 octets?0.0.0.0 - 255.255.255.255
- 23IP packet has 2 parts- header (senders ip, receivers ip)
- data (binary code) - 24TCPSplits data into packets
- data packets are routed over the LAN to the destination node, based on IP address - 25UPP- user datagram protocol
- alternative to TCP but...
• less overhead and no error correction
• when near "realtime" transmission is desired - 26Network address translation (NAT)- stretches IPv4 address space by allowing single internet IP address for all hosts on a LAN
- router uses internet IP for LAN and on external IP (gateway) for internet - 27PINGProgram that tests TCP/IP connectivity
- 28Subnet Mask- used to reveal network and host portions of IP addresses
- 29Network Broadcast Address- packets sent to this are broadcast to all nodes on LAN
- 30Static IP- permanent & persistent
- 31Dynamic IP- temporarily leased for duration of connection
- 32Hostname- a name associated with a hosts IP address
- 33DNS- domain network system
- system of servers and protocols used to resolve internet domain names to IP addresses - 34HOP- intermediary stops that an IP package takes on route to destination
- 35Tracer route- program used for tracking hops
- 36Managed Switch- configurable LAN switch that can assert more control over network traffic
- 37IP traffic can be sent:- unicast: 1 - 1
- broadcast: 1 - all
- multicast: 1 - many
Información
- Descripción
- Fichas sobre Comp 2, creado por clay harding el 10/01/2017.
- Creado por
- clay harding
- Visitas
- 2
- Valoración