Flashcards · 0417 · Topic 4

Networks and the effects of using them flashcards

11 cards on Topic 4, subtopics 4.1 to 4.2. Pick a subtopic or study them all.

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What are the three functions of a router?: It connects networks and devices to the internet, stores computer addresses, and routes data packets to their destination.
Hub vs switch vs bridge: A hub sends data to every connected device. A switch learns which device is on which port and sends data only to the intended device. A bridge joins two network segments into one.
Wi-Fi vs Bluetooth: Wi-Fi connects a device to a wider network or the internet over a larger range. Bluetooth connects two devices directly over a short range, with no network needed, e.g. headphones.
Intranet vs extranet vs internet: Intranet: private, for one organisation only. Extranet: private network with controlled access for chosen outsiders such as suppliers. Internet: global and public.
LAN vs WLAN vs WAN: LAN: a small area such as one building, usually cabled. WLAN: the wireless version of a LAN. WAN: a large area joining LANs across sites, cities or countries; the internet is the largest WAN.
Cloud computing: one advantage and one disadvantage: Advantage: accessible from any device with an internet connection, with less need for local storage. Disadvantage: depends on a working connection and on a third party for security and availability.

What makes a password strong?: It is long, mixes character types (upper and lower case, numbers, symbols) and avoids personal information such as names or birthdates.
What are the three types of authentication factor?: Something you know (a password), something you have (a token or card) and something you are (a biometric). Combining them is multi-factor authentication.
What is zero login?: Authentication by passive signals, such as typing pattern, location or device recognition, with no active entry by the user.
Why must anti-malware software be kept up to date?: It relies on a database of known malware signatures, so it cannot recognise malware discovered after its last update.
Video- vs audio- vs web-conferencing: Video: camera, microphone, speakers and a fast connection; suits meetings where seeing people matters. Audio: voice only, lower bandwidth. Web: adds shared documents and screens for collaboration.