BITM Networking and System Administration

What is a router?

What is the difference between a LAN and a WAN?

A small company with 25 employees is setting up its first office network. They need to connect all their computers to the internet and want to ensure their internal network is protected from external threats. Recommend the primary network device they should use to connect to the internet and another device for security and explain how each device helps achieve their goals.

Name the two primary protocols of the TCP/IP model.

What is the main function of the Presentation layer in the OSI model?

Briefly describe the process of data encapsulation.

Explain the function of the Transport layer in the OSI model.

Imagine you are sending an email from your computer to a colleague. Describe the process of data encapsulation and decapsulation that the email data undergoes as it travels through the network, from the moment you click "send" on your computer until it reaches your colleague's inbox. Mention at least three layers of the OSI model and what happens at each stage.

What is the purpose of a subnet mask?

How do IPv4 and IPv6 addresses differ in length?

An IT administrator is given the IP address 192.168.10.0 and a subnet mask of 255.255.255.0 to manage a small network. Explain the purpose of this subnet mask in relation to the IP address. How does it help the administrator logically organize the network?

List two common types of network attacks.

Explain the purpose of the firewall in a network.

What is a DoS attack and how does it differ from a DDoS attack?

A large e-commerce company is experiencing a significant increase in online traffic and is concerned about a potential DDoS attack. As a network security expert, you are tasked with outlining a comprehensive security strategy. Explain how you would use a combination of a firewall and an Intrusion Prevention System (IPS) to mitigate this threat. Detail the specific role of each tool and how they work together to protect the company's network and services.

What does the acronym WPA stand for in the context of wireless security?

Give one example of a system administration task.

What is SNMP used for in network management?

Define cloud computing.

Explain the concept of virtualization.

Describe the three main cloud computing service models: IaaS, PaaS, and SaaS.

A startup is building a new web application and wants to avoid the high cost of purchasing and maintaining its own physical servers. They are considering cloud computing. Explain the concept of virtualization and describe the three main cloud service models (IaaS, PaaS, and SaaS). Based on the scenario, which of these service models would be the most suitable for the startup to host and run their web application, and why?