(Due to technical issues, the search service is temporarily unavailable.
Here’s a structured set of **60 multiple-choice questions** covering **OSI
layers, network cables, IP addresses, and common network protocols**,
organized by topic. Answers are provided at the end of each section.
---
### **OSI Model (20 Questions)**
1. **Which OSI layer transmits raw bitstreams over physical media?**
a) Application
b) Physical ✅
c) Transport
d) Network
2. **Routing occurs at which layer?**
a) Network ✅
b) Data Link
c) Transport
d) Session
3. **MAC addresses operate at which layer?**
a) Network
b) Data Link ✅
c) Physical
d) Transport
4. **Encryption is primarily handled by the:**
a) Application layer
b) Presentation layer ✅
c) Session layer
d) Transport layer
5. **TCP and UDP operate at the:**
a) Transport layer ✅
b) Network layer
c) Data Link layer
d) Application layer
6. **Which device operates at the Network layer?**
a) Switch
b) Hub
c) Router ✅
d) Repeater
7. **The Session layer is responsible for:**
a) Data encryption
b) Establishing/managing connections ✅
c) Packet forwarding
d) Error detection
8. **HTTP operates at the:**
a) Application layer ✅
b) Presentation layer
c) Session layer
d) Transport layer
9. **Which layer ensures end-to-end data delivery?**
a) Network
b) Transport ✅
c) Data Link
d) Physical
10. **Frames are associated with the:**
a) Network layer
b) Data Link layer ✅
c) Physical layer
d) Transport layer
11. **A switch operates at which layer?**
a) Data Link ✅
b) Network
c) Physical
d) Transport
12. **Which layer translates data formats (e.g., ASCII to binary)?**
a) Presentation ✅
b) Application
c) Session
d) Transport
13. **Port numbers are managed at the:**
a) Transport layer ✅
b) Network layer
c) Application layer
d) Data Link layer
14. **Which layer handles logical addressing (e.g., IP addresses)?**
a) Network ✅
b) Transport
c) Data Link
d) Session
15. **Segmentation of data occurs at the:**
a) Transport layer ✅
b) Network layer
c) Data Link layer
d) Physical layer
16. **Which layer is responsible for flow control?**
a) Transport ✅
b) Network
c) Data Link
d) Session
17. **ARP (Address Resolution Protocol) operates at:**
a) Network layer
b) Data Link layer ✅
c) Transport layer
d) Physical layer
18. **Which layer terminates a communication session?**
a) Session ✅
b) Application
c) Transport
d) Presentation
19. **Which layer uses checksums for error detection?**
a) Data Link
b) Transport ✅
c) Network
d) Physical
20. **The Application layer interacts directly with:**
a) End-user software ✅
b) Network cabling
c) IP addresses
d) MAC addresses
---
### **Network Cables (15 Questions)**
21. **Which cable type is immune to EMI?**
a) UTP
b) Coaxial
c) Fiber optic ✅
d) STP
22. **RJ45 connectors are used with:**
a) Coaxial
b) Fiber optic
c) Twisted pair ✅
d) USB
23. **Cat6 cables support speeds up to:**
a) 100 Mbps
b) 1 Gbps
c) 10 Gbps ✅
d) 100 Gbps
24. **Single-mode fiber is best for:**
a) Short distances
b) Long distances ✅
c) High EMI environments
d) Low cost
25. **Thicknet (10BASE5) is a type of:**
a) Twisted pair
b) Coaxial ✅
c) Fiber optic
d) USB
26. **Which cable uses light signals?**
a) UTP
b) STP
c) Fiber optic ✅
d) Coaxial
27. **Shielded Twisted Pair (STP) is used in:**
a) High-interference environments ✅
b) Long-distance backbones
c) Wireless networks
d) Low-cost setups
28. **The maximum length for UTP Cat5e is:**
a) 50 meters
b) 100 meters ✅
c) 200 meters
d) 500 meters
29. **BNC connectors are used with:**
a) Fiber optic
b) Coaxial ✅
c) UTP
d) STP
30. **Which cable type is cheapest?**
a) Fiber optic
b) Coaxial
c) UTP ✅
d) STP
31. **Multimode fiber uses:**
a) Laser light
b) LED light ✅
c) Electrical signals
d) Radio waves
32. **Crossover cables are used to connect:**
a) PC to router
b) PC to switch
c) Switch to switch ✅
d) PC to modem
33. **T568A and T568B are standards for:**
a) Fiber optic
b) Coaxial
c) Twisted pair ✅
d) USB
34. **Which cable supports PoE (Power over Ethernet)?**
a) Cat5e ✅
b) Coaxial
c) Fiber optic
d) USB
35. **10BASE-T uses:**
a) Twisted pair ✅
b) Coaxial
c) Fiber optic
d) Wireless
---
### **IP Addressing (15 Questions)**
36. **IPv4 addresses are:**
a) 32-bit ✅
b) 64-bit
c) 128-bit
d) 256-bit
37. **Which is a private IP range?**
a) 192.168.1.1 ✅
b) 172.32.0.1
c) 169.254.0.5
d) 8.8.8.8
38. **APIPA assigns addresses in the range:**
a) 10.0.0.0/8
b) 172.16.0.0/12
c) 192.168.0.0/16
d) 169.254.0.0/16 ✅
39. **The loopback address is:**
a) 127.0.0.1 ✅
b) 192.168.0.1
c) 0.0.0.0
d) 255.255.255.255
40. **How many hosts in a /24 subnet?**
a) 254 ✅
b) 255
c) 256
d) 512
41. **Which class is 191.255.255.255?**
a) A
b) B ✅
c) C
d) D
42. **CIDR notation for 255.255.255.0 is:**
a) /24 ✅
b) /16
c) /32
d) /8
43. **NAT translates:**
a) Private to public IPs ✅
b) MAC to IP addresses
c) Domain names to IPs
d) IPv4 to IPv6
44. **Which is an IPv6 address?**
a) 2001:0db8:85a3::8a2e:0370:7334 ✅
b) 192.168.1.1
c) 172.16.254.1
d) 10.0.0.0/8
45. **The subnet mask 255.255.0.0 corresponds to:**
a) /8
b) /16 ✅
c) /24
d) /32
46. **Which is a valid IPv4 address?**
a) 256.1.1.1
b) 192.168.1.256
c) 172.16.255.0 ✅
d) 1234.567.89.0
47. **DHCP is used to assign:**
a) IP addresses dynamically ✅
b) MAC addresses
c) Domain names
d) Port numbers
48. **Which is a multicast address?**
a) 224.0.0.1 ✅
b) 10.0.0.1
c) 172.16.0.1
d) 192.168.1.1
49. **IPv6 uses _____ addressing.**
a) 32-bit
b) 64-bit
c) 128-bit ✅
d) 256-bit
50. **The purpose of a default gateway is to:**
a) Forward traffic to other networks ✅
b) Assign IP addresses
c) Resolve domain names
d) Encrypt data
---
### **Common Network Protocols (10 Questions)**
51. **Which protocol is connectionless?**
a) TCP
b) UDP ✅
c) HTTP
d) FTP
52. **Port 80 is used by:**
a) HTTPS
b) SSH
c) HTTP ✅
d) DNS
53. **DNS translates:**
a) IP to MAC
b) Domain to IP ✅
c) IP to Port
d) Public to Private IP
54. **Which protocol uses port 22?**
a) Telnet
b) SSH ✅
c) SMTP
d) FTP
55. **DHCP uses port:**
a) 67/68 ✅
b) 80
c) 443
d) 25
56. **ICMP is used for:**
a) Email
b) File transfer
c) Error reporting ✅
d) Web browsing
57. **Which is a transport layer protocol?**
a) IP
b) ARP
c) TCP ✅
d) HTTP
58. **SMTP operates on port:**
a) 25 ✅
b) 110
c) 143
d) 443
59. **ARP resolves:**
a) IP to MAC ✅
b) MAC to IP
c) Domain to IP
d) IP to Port
60. **QUIC protocol is used by:**
a) HTTP/3 ✅
b) FTP
c) Telnet
d) SNMP
---
### **Answer Keys**
**OSI Model:**
1. b, 2. a, 3. b, 4. b, 5. a, 6. c, 7. b, 8. a, 9. b, 10. b, 11. a, 12. a, 13. a, 14. a,
15. a, 16. a, 17. b, 18. a, 19. b, 20. a
**Network Cables:**
21. c, 22. c, 23. c, 24. b, 25. b, 26. c, 27. a, 28. b, 29. b, 30. c, 31. b, 32. c,
33. c, 34. a, 35. a
**IP Addressing:**
36. a, 37. a, 38. d, 39. a, 40. a, 41. b, 42. a, 43. a, 44. a, 45. b, 46. c, 47. a,
48. a, 49. c, 50. a
**Protocols:**
51. b, 52. c, 53. b, 54. b, 55. a, 56. c, 57. c, 58. a, 59. a, 60. a
(Due to technical issues, the search service is temporarily unavailable.)
Here are 20 multiple-choice questions about IP Address classes, including
answers:
---
**1. Which class does the IP address 10.5.6.7 belong to?**
A) Class A
B) Class B
C) Class C
D) Class D
**Answer:** A) Class A
---
**2. What is the default subnet mask for Class B?**
A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
**Answer:** B) 255.255.0.0
---
**3. The first octet range for Class C addresses is:**
A) 1–126
B) 128–191
C) 192–223
D) 224–239
**Answer:** C) 192–223
---
**4. Class D IP addresses are primarily used for:**
A) Unicast communication
B) Broadcast communication
C) Multicast communication
D) Experimental purposes
**Answer:** C) Multicast communication
---
**5. Which of the following is a Class B address?**
A) 172.16.2.1
B) 192.168.1.1
C) 10.50.60.70
D) 224.0.0.10
**Answer:** A) 172.16.2.1
---
**6. Which class supports the largest number of hosts per network?**
A) Class A
B) Class B
C) Class C
D) Class D
**Answer:** A) Class A
---
**7. Which IP address is part of the Class A private range?**
A) 172.16.0.1
B) 192.168.1.1
C) 10.0.0.1
D) 169.254.1.1
**Answer:** C) 10.0.0.1
---
**8. The IP address 127.0.0.1 is reserved for:**
A) Public internet use
B) Loopback testing
C) Multicast groups
D) Private networks
**Answer:** B) Loopback testing
---
**9. Which address is a valid multicast IP?**
A) 192.168.1.1
B) 224.0.0.5
C) 172.30.1.1
D) 10.10.10.10
**Answer:** B) 224.0.0.5
---
**10. Class E addresses are reserved for:**
A) Public use
B) Broadcast traffic
C) Experimental purposes
D) Private networks
**Answer:** C) Experimental purposes
---
**11. How many host addresses are available in a Class C network?**
A) 254
B) 65,534
C) 16,777,214
D) 255
**Answer:** A) 254
---
**12. Which IP address is invalid for public use?**
A) 172.32.0.1
B) 192.167.1.1
C) 191.255.255.255
D) 10.12.14.16
**Answer:** D) 10.12.14.16 (private IP)
---
**13. The IP address 191.255.255.255 belongs to which class?**
A) Class A
B) Class B
C) Class C
D) Class D
**Answer:** B) Class B
---
**14. What is the maximum number of networks in Class B?**
A) 126
B) 16,384
C) 2,097,152
D) 254
**Answer:** B) 16,384 (2^14)
---
**15. Which class has the largest network portion in its default subnet mask?
**
A) Class A
B) Class B
C) Class C
D) Class D
**Answer:** C) Class C
---
**16. Which class is typically used for small organizations?**
A) Class A
B) Class B
C) Class C
D) Class D
**Answer:** C) Class C
---
**17. Which address is a Class C private IP?**
A) 10.1.2.3
B) 172.16.1.1
C) 192.168.0.1
D) 224.0.0.1
**Answer:** C) 192.168.0.1
---
**18. The starting range for Class D addresses is:**
A) 224.0.0.0
B) 240.0.0.0
C) 128.0.0.0
D) 192.0.0.0
**Answer:** A) 224.0.0.0
---
**19. Which IP is reserved for loopback?**
A) 169.254.1.1
B) 127.0.0.1
C) 0.0.0.0
D) 255.255.255.255
**Answer:** B) 127.0.0.1
---
**20. Which class is not assigned to hosts?**
A) Class A
B) Class B
C) Class C
D) Class E
**Answer:** D) Class E
---
These questions cover IP address ranges, subnet masks, use cases, private
vs. public distinctions, and reserved addresses.
