Karteikarten
Network Hardware
Karten in diesem Stapel (12)
- 1Why is star topology always the preferred solution?Star topology is very fault-tolerant
If one of the connections break, it doesn't interfere with any other connection; vs. Bus topology and Ring topology - 2What is a WAN and LAN? What is the difference?LAN – Local Area Network; a network that connects a relatively small number of machines of machines in a relatively close geographical area
WAN – Wide Area Network; a network that connects local-area networks (LANs) over a potentially large geographic distance - 3What is the function of a router?Router
Routers deal with traffic
Gives rules to packets of data going around the network
Need a router to connect to another network
These networks can be LAN or WAN
They connect at least two networks together - 4What is the function of a switch?Purely allows devices to connect to each other
Packets are sent by the PC, received by the switch and then immediately forwarded on (Packet switching)
No rules are applied to the packets
Can only operate within LANs, not WANs - 5What is the function of a firewall?Prevents unauthorised access to a network ( good base definition)
Inspects every packet entering and leaving (getting in and out) to ensure they meet specified security criteria - 6What is the function of a modem?Modem (Modulate/demodulate)
Only needed to turn digital to analogue and vice versa. ONLY PUPOSE. END.
Allow data to travel over phonelines(because phoneline are analogue)
In exam questions, modems are only in the network if phonelines are mentioned - 7What is ADSL and DSL?ADSL (Asynchronous Digital Subscriber Line)
DSL--> copper analogue cable (phone line), not designed to carry digital zeroes and ones, carries analogue signals (sound) - 8What is a NIC and its function?Network Interface Card (NIC)
Every devices that connects to the network requires a NIC
Purely allows connection to a networks (that all it does) - 9What is an AP and its function?Wireless Access Point (AP)
It provides a 'communication hub' for wireless devices - 10What is the function of a bridge?Similar to routers but only connect two (2) LANs together
This reduces traffic on LANs by seperating them - 11What is a gateway and its function?A gateway is a router
The only difference is that a gateway will always sit at the edge of a network (whereas a router could be anywhere connecting networks together).
A gateway will deal with different protocols; transfer one protocol to another - 12—
Informationen
- Beschreibung
- Computer Science Karteikarten am Network Hardware, erstellt von Lazza B am 19/10/2017.
- Erstellt von
- Lazza B
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- 1
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