3.5 Networks Flashcards
(15 cards)
What is a network protocol?
A set of rules and standards that determine how data packets are transmitted
What is a network topology?
The arrangement of nodes and connections within a network
What is a computer network?
A computer network is created when two or more computers are connected through a communication medium, either physically using a cable or wirelessly
What are the benefits of a computer network?
Fast communication, sharing peripherals, roaming, remote management, centralised management, file sharing
What are the risks of a computer network?
Hacking, hardware reliance, network speed, viruses
What are 4 methods of network security?
Encryption, MAC address filtering, Authentication, Firewall
Explain the process of authentication.
The process of verifying a user or device before allowing access to a system or resource.
What is encryption?
Encoding of data so it can no longer be easily understood.
What is a firewall?
Firewalls check packets entering and leaving the network to see where they are coming from or going to and what they contain. Packets that don’t match filtering rules are dropped. This is known as a packet filter. Firewalls can be run on dedicated hardware or as software.
Where are firewalls normally positioned in the LAN?
Between external and internal networks.
Explain MAC address filtering
MAC address filtering blocks/approves a specific device. A wireless router can be configured to block access to specified devices based on their MAC addresses
Write a brief explanation of the TCP/IP stack
A layered model that controls the different aspects of communication
Describe the TCP protocol
Breaks up data into packets, resends lost messages, detects errors and reassembles packets at the other end
What is a network layer?
A division of network functionality. Each layer has its own specific functions to perform
