Skip to main content

Quiz - Module 5: Network & Security

Test your knowledge on networking, OSI, DNS, and Windows security!

Question 1​

How many layers does the OSI model have?

  • A) 5
  • B) 6
  • C) 7
  • D) 8
See the answer

Answer: C) 7

The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application.

Question 2​

Which OSI layer does the IP protocol belong to?

  • A) Layer 2 (Data Link)
  • B) Layer 3 (Network)
  • C) Layer 4 (Transport)
  • D) Layer 7 (Application)
See the answer

Answer: B) Layer 3 (Network)

IP handles addressing and routing at the network level.

Question 3​

Which layer does TCP belong to?

  • A) Layer 2
  • B) Layer 3
  • C) Layer 4 (Transport)
  • D) Layer 7
See the answer

Answer: C) Layer 4 (Transport)

TCP ensures reliable data transport.

Question 4​

What does DNS stand for?

  • A) Dynamic Network System
  • B) Domain Name System
  • C) Data Network Service
  • D) Digital Name Server
See the answer

Answer: B) Domain Name System

DNS translates domain names into IP addresses.

Question 5​

Which port does DNS use by default?

  • A) 80
  • B) 443
  • C) 53
  • D) 22
See the answer

Answer: C) 53

DNS uses port 53 (UDP and TCP).

Question 6​

What does DHCP stand for?

  • A) Dynamic Host Configuration Protocol
  • B) Data Handling Control Process
  • C) Digital Home Connection Port
  • D) Domain Host Control Protocol
See the answer

Answer: A) Dynamic Host Configuration Protocol

DHCP automatically assigns IP addresses.

Question 7​

What is the loopback IP address?

  • A) 192.168.1.1
  • B) 127.0.0.1
  • C) 10.0.0.1
  • D) 255.255.255.255
See the answer

Answer: B) 127.0.0.1

127.0.0.1 (localhost) points to the machine itself.

Question 8​

What is UAC?

  • A) A virus
  • B) User Account Control
  • C) A network protocol
  • D) A type of RAM
See the answer

Answer: B) User Account Control

UAC protects against unauthorized system changes.

Question 9​

What is Windows Defender?

  • A) A game
  • B) The built-in antivirus and anti-malware for Windows
  • C) A browser
  • D) A firewall only
See the answer

Answer: B) The built-in antivirus and anti-malware for Windows

Windows Defender protects against viruses, malware, and threats.

Question 10​

Which port does HTTP use?

  • A) 21
  • B) 22
  • C) 80
  • D) 443
See the answer

Answer: C) 80

HTTP uses port 80 by default.

Question 11​

Which port does HTTPS use?

  • A) 80
  • B) 443
  • C) 21
  • D) 22
See the answer

Answer: B) 443

HTTPS (secure HTTP) uses port 443.

Question 12​

Which command displays the ARP table?

  • A) ipconfig
  • B) arp -a
  • C) ping
  • D) netstat
See the answer

Answer: B) arp -a

arp -a displays known IP/MAC associations.

Question 13​

What is a MAC address?

  • A) An IP address
  • B) The unique physical address of a network card
  • C) An email address
  • D) A web address
See the answer

Answer: B) The unique physical address of a network card

The MAC address uniquely identifies each network card.

Question 14​

Which class of private IP address starts with 192.168?

  • A) Class A
  • B) Class B
  • C) Class C
  • D) Class D
See the answer

Answer: C) Class C

192.168.x.x is a private Class C range.

Question 15​

What is a subnet mask?

  • A) A virus
  • B) A value that separates the network part from the host part of an IP
  • C) A password
  • D) A protocol
See the answer

Answer: B) A value that separates the network part from the host part

The mask defines which part of the IP identifies the network.

Question 16​

What does 255.255.255.0 mean?

  • A) IP address
  • B) Subnet mask /24
  • C) Broadcast address
  • D) Gateway
See the answer

Answer: B) Subnet mask /24

255.255.255.0 = /24, the first 24 bits are for the network.

Question 17​

What is the default gateway?

  • A) A virus
  • B) The router's address to access other networks
  • C) The local IP address
  • D) The DNS server
See the answer

Answer: B) The router's address to access other networks

The gateway routes traffic to the Internet or other networks.

Question 18​

Which command clears the Windows DNS cache?

  • A) ipconfig /release
  • B) ipconfig /flushdns
  • C) ping /dns
  • D) netstat /dns
See the answer

Answer: B) ipconfig /flushdns

ipconfig /flushdns clears the DNS resolution cache.

Question 19​

What is Nmap?

  • A) A virus
  • B) A network scanning and port discovery tool
  • C) A browser
  • D) An antivirus
See the answer

Answer: B) A network scanning and port discovery tool

Nmap allows discovering hosts and services on a network.

Question 20​

Which port does SSH use?

  • A) 21
  • B) 22
  • C) 23
  • D) 25
See the answer

Answer: B) 22

SSH (Secure Shell) uses port 22.

Question 21​

Which port does FTP use?

  • A) 20 and 21
  • B) 22
  • C) 80
  • D) 443
See the answer

Answer: A) 20 and 21

FTP uses port 21 (commands) and 20 (data).

Question 22​

What is the ARP protocol?

  • A) A virus
  • B) Address Resolution Protocol - associates IP and MAC
  • C) A browser
  • D) An antivirus
See the answer

Answer: B) Address Resolution Protocol

ARP finds the MAC address corresponding to an IP address.

Question 23​

What is an ARP Spoofing attack?

  • A) A port scan
  • B) A MAC address spoofing to intercept traffic
  • C) An email virus
  • D) A weak password
See the answer

Answer: B) A MAC address spoofing to intercept traffic

The attacker impersonates the gateway to intercept traffic.

Question 24​

What is the ICMP protocol?

  • A) A browser
  • B) Internet Control Message Protocol - used by ping
  • C) A virus
  • D) An antivirus
See the answer

Answer: B) Internet Control Message Protocol

ICMP is used by ping and traceroute for network diagnostics.

Question 25​

What is the difference between TCP and UDP?

  • A) They are identical
  • B) TCP is reliable with connection, UDP is fast without guarantee
  • C) UDP is more secure
  • D) TCP is faster
See the answer

Answer: B) TCP is reliable with connection, UDP is fast without guarantee

TCP guarantees delivery, UDP is lighter and faster.

Question 26​

What is a firewall?

  • A) An antivirus
  • B) A system that filters incoming/outgoing network traffic
  • C) A browser
  • D) A protocol
See the answer

Answer: B) A system that filters incoming/outgoing network traffic

The firewall blocks or allows traffic according to rules.

Question 27​

Which command opens the advanced Windows firewall?

  • A) firewall.cpl
  • B) wf.msc
  • C) cmd
  • D) regedit
See the answer

Answer: B) wf.msc

wf.msc opens the Windows Firewall with advanced features.

Question 28​

What is an inbound firewall rule?

  • A) A virus
  • B) A rule that filters traffic arriving at the machine
  • C) A rule for outgoing traffic
  • D) A protocol
See the answer

Answer: B) A rule that filters traffic arriving at the machine

Inbound rules control what can connect to the machine.

Question 29​

What is NAT?

  • A) A virus
  • B) Network Address Translation - translates private addresses to public
  • C) An antivirus
  • D) An email protocol
See the answer

Answer: B) Network Address Translation

NAT allows multiple private machines to share a public IP.

Question 30​

Which command displays listening ports?

  • A) ipconfig
  • B) netstat -an
  • C) ping
  • D) arp
See the answer

Answer: B) netstat -an

netstat -an displays all connections and listening ports.

Score​

ScoreLevel
27-30Excellent!
22-26Very good!
17-21Good
12-16Fair
0-11Needs review

Quiz for Module 5 - Network & Security - 30 questions