Unit 9 - Computer Networks
Key Components and Interconnection Devices (P3, P4)
The key components used in networking:
Key components: network devices; interconnecton devices; connectors and cabling; sofware
Network devices: workstatons; servers e.g. print, mail, fle, web, proxy; others e.g. network
interface cards (NIC); features and functons
Interconnecton devices: equipment e.g. router, switch, wireless access points; purposes, features
and functons of each
Connectors and cabling: leased line; dedicated line; media types e.g. STP, Category 5, coaxial, UTP,
fbre optc; wireless; mobile technology; cablecconnecton standards
Sofware: network operatng system; virus checker; frewall; other e.g. email client
Commercial systems: sofware e.g. Mac OSX, Linux, Windows
Typical Network Services (P5)
Telecommunication services:
communicaton e.g. email, internet relay chat (IRC), discussion boards
remote access e.g. via mobiles, remote desktop, social networking
File services:
fle transfer
fle sharing
Application services:
applicaton sofware e.g. database, web, proxy
shared resources e.g. printng, storage space
Voice over IP (VoIP);
mobile working
authentcaton e.g. users, hardware
Business Risks and Securing Systems (M3)
Business risks: loss of service; loss of business or income e.g. through loss of customer records;
increased costs; loss of confdentality; compromised data integrity; security issues e.g. malware
(hostle, intrusive, or annoying sofware or program code), viruses, Trojans, worms, spyware, adware
Securing a system: passwords, authorisaton permissions and access control lists; backing up and
restoring; encryptng; others e.g. biometrics; physical security e.g. CCTV, locks, frewalls; security risk
levels; sofware protecton e.g. antvirus, intrusion detecton systems.
Key Components and Interconnection Devices (P3, P4)
The key components used in networking:
Key components: network devices; interconnecton devices; connectors and cabling; sofware
Network devices: workstatons; servers e.g. print, mail, fle, web, proxy; others e.g. network
interface cards (NIC); features and functons
Interconnecton devices: equipment e.g. router, switch, wireless access points; purposes, features
and functons of each
Connectors and cabling: leased line; dedicated line; media types e.g. STP, Category 5, coaxial, UTP,
fbre optc; wireless; mobile technology; cablecconnecton standards
Sofware: network operatng system; virus checker; frewall; other e.g. email client
Commercial systems: sofware e.g. Mac OSX, Linux, Windows
Typical Network Services (P5)
Telecommunication services:
communicaton e.g. email, internet relay chat (IRC), discussion boards
remote access e.g. via mobiles, remote desktop, social networking
File services:
fle transfer
fle sharing
Application services:
applicaton sofware e.g. database, web, proxy
shared resources e.g. printng, storage space
Voice over IP (VoIP);
mobile working
authentcaton e.g. users, hardware
Business Risks and Securing Systems (M3)
Business risks: loss of service; loss of business or income e.g. through loss of customer records;
increased costs; loss of confdentality; compromised data integrity; security issues e.g. malware
(hostle, intrusive, or annoying sofware or program code), viruses, Trojans, worms, spyware, adware
Securing a system: passwords, authorisaton permissions and access control lists; backing up and
restoring; encryptng; others e.g. biometrics; physical security e.g. CCTV, locks, frewalls; security risk
levels; sofware protecton e.g. antvirus, intrusion detecton systems.
