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WXFG49L
Contributed by: Monteclaro
  • 1. What is the main purpose of data transmission?
A) Increasing bandwidth.
B) Sending and receiving data between devices.
C) Preventing data loss
D) Encrypting messages.
  • 2. Why are communication protocols important?
A) They allocate IP addresses.
B) They compress files.
C) They define rules for data exchange and ensure integrity
D) They clean corrupted data.
  • 3. Which OSI layer ensures reliable delivery?
A) Data link
B) Physical
C) Transport
D) network
  • 4. What layer of the OSI model handles logical addressing and routing?
A) Physical
B) Network
C) Network
D) Data link
  • 5. Which protocol operates at the Application layer?
A) HTTP
B) Ethernet
C) TCP
D) IP
  • 6. How many layers does the OSI model have?
A) 4
B) 6
C) 7
D) 5
  • 7. The TCP/IP model has how many layers?
A) 5
B) 6
C) 4
D) 7
  • 8. The Network Access layer in TCP/IP combines which OSI layers?
A) Application and Presentation
B) Network and Transport.
C) Data Link and Physical
D) Application and Transpor.
  • 9. Encapsulation & De-Encapsulation What is data encapsulation?
A) Adding headers/trailers to data
B) Deleting packets.
C) Data encryption
D) Deleting packets.
  • 10. Which layer converts data into signals?
A) Session
B) Data Link
C) Network
D) Physical
  • 11. In the encapsulation process, which layer adds source and destination IP addresses?
A) Network
B) Data link
C) Physical
D) Session
  • 12. What does the Data Link layer add during encapsulation?
A) IP addresses
B) Port numbers.
C) MAC hearders and trailers
D) Protocol identifiers.
  • 13. What is the main purpose of ARP?
A) Check connectivity.
B) Assign IP addresses
C) Resolve IP to MAC adddresses.
D) Translate domain names.
  • 14. What does a computer send when it doesn't know a MAC address?
A) Ping Request
B) ICMP Echo
C) DNS Query
D) ARP Reques.
  • 15. ARP Spoofing is a.
A) Hardware failure.
B) Man-in-the-middle attack.
C) DNS attack.
D) Software update.
  • 16. ICMP Which command uses ICMP Echo Requests?
A) ipconfig
B) netstat
C) ping
D) arp
  • 17. Which ICMP message is used in Traceroute?
A) Determining paths for data
B) Time Exceeded
C) Assigning IP addresses
D) Configuring firewalls
  • 18. Which type of routing uses protocols like OSPF?
A) Static Routing
B) ) Manual Routing
C) Physical Routing
D) Dynamic Routing
  • 19. Which routing protocol is best for small networks?
A) RIP
B) BGP
C) OSPF
D) DHCP
  • 20. What does a routing table contain?
A) Destination networks and next hops
B) Encrypted passwords
C) DNS records
D) MAC addresses
  • 21. What is the purpose of a default gateway?
A) Encrypts data
B) It converts MAC to IP
C) Forwards traffic to external networks
D) Assigns static routes
  • 22. IP Addressing What type of address is 192.168.1.1?
A) Loopback address
B) ) Reserved multicast.
C) Public IPv6 address
D) Private IPv4 address.
  • 23. How many bits are in an IPv4 address?
A) 64
B) 128
C) 8
D) 32
  • 24. What is the loopback IP address?
A) 0.0.0.0
B) 10.0.0.1
C) 192.168.0.1
D) 127.0.0.1
  • 25. Which IP address class has a default subnet mask of 255.255.255.0?
A) Class D
B) Class B
C) Class A
D) Class C
  • 26. Subnetting What is the CIDR notation for 255.255.255.0?
A) /24
B) /28
C) /26
D) /27
  • 27. How many usable IPs are in a /26 subnet?
A) 16
B) 8
C) 62
D) 32
  • 28. What is the broadcast address of 192.168.1.0/26?
A) 192.168.1.63
B) B) 192.168.1.62
C) B) 192.168.1.61
D) B) 192.168.1.64
  • 29. VLSM (Variable Length Subnet Masking) VLSM allows.
A) Port translation
B) Encryption by subnet
C) ) Same subnet size everywhere
D) Different subnet sizes in the same network
  • 30. Which subnet mask is appropriate for 20 hosts?
A) /27
B) /30
C) /28
D) /24
  • 31. How many bits are in an IPv6 address?
A) 64
B) 32
C) 128
D) 48
  • 32. What format is used in IPv6?
A) Decimal
B) Hexadecimal
C) Binary
D) Octal
  • 33. Which of the following is a valid IPv6 address?
A) 127.0.0.1
B) 10.0.0.1
C) 2001:db8::1
D) 192.168.1.1
  • 34. Does IPv6 use subnet masks?
A) No, uses prefix notation
B) Sometimes
C) Yes
D) Only for private ips
  • 35. ools & Troubleshooting Which command shows current IP configuration?
A) tracert
B) Ping
C) ipconfig / ifconfig
D) netstat
  • 36. What does arp -a do?
A) Trace MAC addresses
B) Show routing table
C) Display ARP cache
D) Display ARP table
  • 37. traceroute is used to:
A) Trace the path to a destination.
B) Encrypt packets
C) Resolve DNS
D) Check MAC addresses
  • 38. What layer is responsible for user interaction in OSI?
A) Network
B) Application
C) Session
D) Transport
  • 39. Which protocol is used for error messages in IP networks?
A) SMTP
B) ICMP
C) FTP
D) TCP
  • 40. Ethernet works on which OSI layer?
A) Physical only
B) Network
C) Transport
D) Data link
  • 41. What is the role of the Transport layer?
A) Provide end-to-end communication.
B) Format data
C) Encrypt data
D) Provide IP addresses
  • 42. Which device uses a routing table to make decisions?
A) Firewall
B) Router
C) Hub
D) Switch
  • 43. Practical Application What kind of device uses both MAC and IP addresses?
A) Hub
B) Switch
C) Repeater
D) Computer/Host
  • 44. What protocol helps find the next-hop router?
A) Routing Protocols like OSPF
B) TCP
C) FTP
D) HTTP
  • 45. In subnetting, what happens when more bits are borrowed?
A) Fewer subnets.
B) Data is lost.
C) IP range increases.
D) More subnets. fewer hosts per subnet.
  • 46. Which class is for multicast?
A) Class A
B) Class B
C) Class C
D) Class D
  • 47. How many usable hosts are in a /30 network?
A) 2
B) 4
C) 3
D) 5
  • 48. Which tool is best for simulating networks in a classroom?
A) PuTTY
B) Netcat
C) Wireshark
D) Packet Tracer
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