Final Review

What is the purpose of the CIA triad in cybersecurity?

• Protecting network speed

• Ensuring security goals of confidentiality, integrity, and availability

• Creating secure passwords

• Monitoring system logs

Answer explanation

The CIA triad is fundamental in cybersecurity, focusing on the security goals of confidentiality, integrity, and availability. This ensures that data is protected, accurate, and accessible when needed.

Which of the following represents 'integrity' in the CIA triad?

• Ensuring data remains unchanged

• Preventing unauthorized access

• Encrypting all sensitive files

• Making data available at all times

Answer explanation

In the CIA triad, 'integrity' refers to ensuring data remains unchanged and accurate. This means protecting data from unauthorized alterations, making 'Ensuring data remains unchanged' the correct representation of integrity.

What type of malware encrypts files and demands a ransom?

• Adware

• Ransomware

• Trojan horse

• Rootkit

Answer explanation

Ransomware is a type of malware that encrypts files on a victim's system and demands a ransom for the decryption key. Unlike adware, Trojan horses, or rootkits, ransomware specifically targets data for financial gain.

What is the main purpose of a router in a network?

• To connect to the internet

• To route traffic between different networks

• To assign IP addresses

• To encrypt network data

Answer explanation

The main purpose of a router is to route traffic between different networks, directing data packets to their appropriate destinations. While routers can connect to the internet and assign IP addresses, their primary function is traffic routing.

Which device connects computers within the same VLAN?

• Switch

• Router

• Firewall

• Bridge

Answer explanation

A switch connects computers within the same VLAN by forwarding data packets based on MAC addresses. Unlike routers, which connect different networks, switches operate at Layer 2 of the OSI model, making them ideal for VLAN communication.

Which layer of the OSI model manages data routing between networks?

• Transport

• Network

• Application

• Data Link

Answer explanation

The Network layer of the OSI model is responsible for routing data between different networks. It determines the best path for data transmission, making it the correct choice for managing data routing.

Which OSI layer is responsible for converting binary data into physical signals?

• Physical

• Data Link

• Network

• Session

Answer explanation

The Physical layer of the OSI model is responsible for converting binary data into physical signals, such as electrical impulses or light signals, enabling data transmission over various media.

How many bits are there in an IPv4 address?

• 32.0

• 64.0

• 128.0

• 256.0

Answer explanation

An IPv4 address consists of 32 bits, divided into four octets. Each octet contains 8 bits, totaling 32 bits. Therefore, the correct answer is 32.0.

What is the primary benefit of IPv6 over IPv4?

• Easier subnetting

• Increased address space

• More secure connections

• Faster data transmission

Answer explanation

The primary benefit of IPv6 over IPv4 is the increased address space. IPv6 provides a vastly larger number of IP addresses, accommodating the growing number of devices connected to the internet, unlike the limited space of IPv4.

Which range of IP addresses is reserved for private networks?

• 192.168.0.0 - 192.168.255.255

• 123.45.0.0 - 123.45.255.255

• 1.1.1.1 - 1.1.1.255

• 255.255.255.0

Answer explanation

The range 192.168.0.0 - 192.168.255.255 is designated for private networks, as specified by RFC 1918. The other options are either public IP addresses or not valid ranges for private use.