Karteikarten
23 to... 29
Karten in diesem Stapel (13)
- 1Bandwidth: The number of bits that can go through the network connection in 1 second.Measured in BITS PER SECOND (bps) Latency: The time in milliseconds between a bit leaving one device and arriving at the other MEASURED IN MILLISECONDS (ms) High B for streaming watching videos Low L for fast results on search enginesB & L
- 2Need to be within range to connect to WiFi Good range speeds up to 54 Mbps Quite widely available ---------------------------------------------------- Hackers sometimes set up fake ones Get you details Cannot use if not in range ================================= Mobile broadband: More coverage than WiFi More secure - the date is encrypted ---------------------------------------------------- You have pay - roaming charges Download limits Lower bandwidthWIFI AND MOBILE BROADBAND
- 3Communicating wirelessly Faster than connection with Bluetooth and normal WiFi You do not need a wireless access point You can set up peer-to-peer networks Also allows devices to use normal access point for WiFi Bluetooth: Allows devices to connect automatically within range w/no user involvement Up to 8 devices at a time Low power - doesn't interfere w/other devicesWiFi Direct/Bluetooth
- 4VoIP: Voice over internet protocol- Transmitting audio messages over the internet. Allows you to make free voice calls from computer/phone tablet so someone else. Useful for keeping in touch when traveling abroad. Using peripherals such as cameras allows you to see the other person.You can make video calls from smartphones.Communication Protocols 1
- 5HTTP: Hypertext transfer protocol- Protocol of the World Wide Web HTTPS: used when sending confidential info. You can check is a website is secure. The data is encrypted so it cannot be read without the encryption key. HTTP over SSL: Secure Sockets Layer ================================= Digital certificates: Double clicking on the padlock icon you can see the sites digital certificate. They are issued by companies like Norton. They can be faked.Communication Protocols 2
- 6(1) the browser check the sites certificate (2) The web server and browser determine the encryption types that they can both use to understand each other. (3)browser and web server send each other unique codes to use when encrypting the info sent. (4) They start talking to each other using the encryption.How HTTPS works
- 7How does Encryption help keep data secure? Encryption Turns data into a secret code suing a key. Only someone with a key can read the dataHow does Encryption help keep data secure?
- 8When connecting comp to a network, it becomes visible to other computers. When connected to the internet, it becomes visible to billions of computers around the world Prevent remote access to your computer with a firewallSecurity Risks in a Network
- 9A firewall prevents or blocks connections between your comp and other comps.What is a firewall
- 10Intercepting Data: Credit card info, personal details, sensitive company information, Bank account info. People intercept to use the details for fraud. Encryption is one way yo keep data safe.Intercepting Data
- 11Authentication is the process of identity You can make passwords and usernames. These prove your identity. Strong passwords: Numbers Upper and lower case punctuation marksIllegal Access
- 12To make sure the person is human and not a computer program you could go through a CAPTCHA testTo ensure you are human...?
- 13Taking your computer and stealing it. You can prevent by 'locking' computer.Physical Security Risks
Informationen
- Beschreibung
- Karteikarten am 23 to... 29, erstellt von Fisnik Islami am 23/04/2015.
- Erstellt von
- Fisnik Islami
- Aufrufe
- 3
- Bewertung