Elsamex Maintenance Services System Administrator Interview Questions and Answers

Firewall is a network security system that monitors and controls incoming and outgoing network traffic. Virus is a malicious software that can replicate itself and infect a computer.

• Firewall acts as a barrier between a trusted internal network and untrusted external network.

• Firewall can block or allow traffic based on predefined security rules.

• Examples of firewalls include hardware firewalls (routers) and software fire...read more

OSI layer is a conceptual framework that standardizes the functions of a telecommunication or computing system. Switches and routers are network devices.

• OSI layer is a model that defines a networking framework with 7 layers, each responsible for specific functions.

• Switches are network devices that operate at Layer 2 (Data Link layer) of the OSI model, forwarding data based on MAC addresses.

• Routers are network devices t...read more