1.3: COMPUTER NETWORKS, CONNECTIONS AND PROTOCOLS 3.0 Flashcards
advantages of using the cloud:
Increase storage e.g. from mobile phones
Independence – the user can work on files anywhere.
disadvantages of using the cloud: (2)
Connection – the user can only access their information if they have network connection.
Security – Data stored online is vulnerable to security attacks.
Describe what Ethernet Cables are and how they support transmission of data.
Ethernet (Cat5E) is a protocol within the TCP/IP stack which it governs the connection of devices over short distances (<100m).
Uses cables to transmit data between devices in a LAN.
advantages of ethernet: (3)
disadvantages of ethernet: (3)
faster transfer speed
better physical security
better range
can’t move easily
can be a tripping hazard
needs more cables to connect new device
advantages of wifi: (3)
disadvantages of wifi: (3)
easy to move around
most devices already have a wifi adaptor
easy to add new devices
data can be intercepted by anyone in range
obstructions weaken signal strength
slower transfer speeds
advantages of bluetooth: (3)
disadvantages of bluetooth: (3)
very low power consumption
ideal for personal devices
easy to make ad-hoc connections
data can be intercepted by anyone in range
very short range
very slow transfer speeds
differences between the states of IP and MAC addresses:
IP = dynamic (can change)
MAC = static (cannot change once set by manufacturer)
differences between the who assigned IP and MAC addresses:
IP = assigned by the router of the network
MAC = assigned to NIC by manufacturer
differences between the structure of IP and MAC addresses:
IPv4 = 4 block of denary separated by full stops
IPv6 = 8 blocks of 4 hex digits, separated by colons
MAC = 12 hex digits, usually in pairs
define what a network layer is:
Describe one advantage of using the TCP/IP Model.
a division of network functionality
self contained; could be taken out and edited without affecting others
protocol for Sending an email.
= SMTP -used for transferring email between remote email server.
protocol for receiving an email:
= POP3 - downloads entire message to your local device and then deletes from the server.
=IMAP -download the server message header until the message is opened and will leave the message on the server.
protocol for loading a webpage
= HTTP - used for accessing and receiving web pages in the form of HTML files on the Internet by requesting from the webserver.
=HTTPS - encrypts the information so that it cannot be understood if it is hacked.
protocol for Sending/receiving a file across a LAN.
=FTP – Used for sending or retrieving files to or from a remote server or computer.
what is a protocol?
An agreement / set of rules for how computers should communicate.
