Networking Questions and Answers Summary

Answered using GPT-4o mini by AI Answer Generator

Question:
  1. Which computers would be able to communicate directly (without any routers involved): A) 192.168.0.5/26 and 192.168.0.100 B) 10.5.5.1/24 and 10.5.5.100/25 C) 10.10.0.17/22 and 10.10.1.30/23 D) 192.168.17.15/29 and 192.168.17.20/28
  2. There’s an IP address 15.242.55.62 with a subnet mask 255.255.255.224 (/27). Please choose all valid host address range within the same subnet. A) 15.242.55.33-15.242.55.63 B) 15.242.55.33-15.242.55.62 C) 15.242.55.31-15.242.55.62 D) 15.242.55.32-15.242.55.63
  3. Select which of the following are 'Public IP addresses': A) 10.110.50.37 B) 172.28.73.21 C) 11.63.72.21 D) 172.168.254.2 E) 192.168.0.1
  4. A network ready device is directly connected to a MikroTik RouterBOARD with a correct U.T.P. RJ45 functioning cable. The device is configured with an IPv4 address of 192.168.100.70 using a subnet mask of 255.255.255.252. What will be a valid IPv4 address for the RouterBOARD 750 for a successful connection to the device? A) 192.168.100.69/255.255.255.252 B) 192.168.100.68/255.255.255.252 C) 192.168.100.70/255.255.255.252 D) 192.168.100.71/255.255.255.252
  5. What protocol does ping use? A) ICMP B) TCP C) ARP D) UDP
  6. In MikroTik RouterOS, Layer-3 communication between 2 hosts can be achieved by using an address subnet of: A) /31 B) /29 C) /30 D) /32
  7. Select valid MAC-address A) 00:00:5E:80:EE:B0 B) AEC8:21F1:AA44:54FF:1111:DDAE:0212:1201 C) G2:60:CF:21:99:H0 D) 192.168.0.0/16
  8. Which of the following are valid IP addresses? A) 10.10.14.0 B) 192.168.13.255 C) 1.27.14.254 D) 192.168.256.1
  9. What is term for the hardware coded address found on an interface? A) Interface Address B) IP Address C) MAC Address D) FQDN Address
  10. You have a router with configuration
  • Public IP :202.168.125.45/24
  • Default gateway:202.168.125.1
  • DNS server: 248.115.148.136, 248.115.148.137
  • Local IP: 192.168.2.1/24

Mark the correct configuration on client PC to access to the Internet A) IP:192.168.2.115/24 gateway: 192.168.2.1 B) IP:192.168.2.2/24 gateway:202.168.125.45 C) IP:192.168.0.1/24 gateway:192.168.2.1 D) IP:192.168.2.253/24 gateway:202.168.0.1 E) IP:192.168.1.223/24 gateway:248.115.148.136 11. MAC layer by OSI model is also known as A) Layer 7 B) Layer 1 C) Layer 6 D) Layer 3 E) Layer 2 12. The network address is A) None of the mentioned B) The first usable address of the subnet C) The last address of the subnet D) The first address of the subnet 13. Collisions are possible in full-duplex Ethernet networks

  1. The basic unit of a physical network (OSI Layer 1) is the: A) Bit B) Byte C) Header D) Frame

  2. How many usable IP addresses are there in a 20-bit subnet? A) 2046 B) 2047 C) 4096 D) 2048 E) 4094

  3. Which of the following is NOT a valid MAC Address? A) 80:GF:AA:67:13:5D B) EA:BA:AA:EE:FF:CB C) 13:16:86:53:89:43 D) 88:0C:00:99:5F:EF E) 95:B5:DD:EE:78:8A

  4. Which of the following protocols / port s are used for SNMP. (Simple Network Managemnt Protocol) A) TCP 25 B) TCP 123 C) TCP 162 D) UDP 162 E) TCP 161 F) UDP 161

  5. Select valid subnet masks: A) 255.255.192.255 B) 255.255.224.0 C) 192.0.0.0 D) 255.192.0.0

  6. How many IP addresses can one find in the header of an IP packet? A) 2 B) 3 C) 1 D) 4

  7. How many layers does Open Systems Interconnection model have? A) 12 B) 6 C) 9 D) 5 E) 7

Answer:

Here are the answers to your questions:

  1. Which computers would be able to communicate directly (without any routers involved):

    • A) 192.168.0.5/26 and 192.168.0.100 (No, they are in different subnets)
    • B) 10.5.5.1/24 and 10.5.5.100/25 (Yes, they are in the same subnet)
    • C) 10.10.0.17/22 and 10.10.1.30/23 (Yes, they are in the same subnet)
    • D) 192.168.17.15/29 and 192.168.17.20/28 (No, they are in different subnets)
    • Answer: B and C

  2. Valid host address range within the same subnet for 15.242.55.62/27:

    • A) 15.242.55.33-15.242.55.63 (No, 15.242.55.63 is the broadcast address)
    • B) 15.242.55.33-15.242.55.62 (Yes, valid range)
    • C) 15.242.55.31-15.242.55.62 (No, 15.242.55.31 is the network address)
    • D) 15.242.55.32-15.242.55.63 (No, 15.242.55.63 is the broadcast address)
    • Answer: B

  3. Select which of the following are 'Public IP addresses':

    • A) 10.110.50.37 (No, private IP)
    • B) 172.28.73.21 (No, private IP)
    • C) 11.63.72.21 (Yes, public IP)
    • D) 172.168.254.2 (No, private IP)
    • E) 192.168.0.1 (No, private IP)
    • Answer: C

  4. Valid IPv4 address for the RouterBOARD 750 for a successful connection:

    • A) 192.168.100.69/255.255.255.252 (Yes, valid)
    • B) 192.168.100.68/255.255.255.252 (No, out of range)
    • C) 192.168.100.70/255.255.255.252 (No, same as device)
    • D) 192.168.100.71/255.255.255.252 (Yes, valid)
    • Answer: A and D

  5. What protocol does ping use?

    • Answer: A) ICMP

  6. Layer-3 communication between 2 hosts can be achieved by using an address subnet of:

    • Answer: C) /30

  7. Select valid MAC-address:

    • A) 00:00:5E:80:EE:B0 (Valid)
    • B) AEC8:21F1:AA44:54FF:1111:DDAE:0212:1201 (Invalid, too long)
    • C) G2:60:CF:21:99:H0 (Invalid, contains non-hex characters)
    • D) 192.168.0.0/16 (Invalid, it's an IP address)
    • Answer: A

  8. Which of the following are valid IP addresses?

    • A) 10.10.14.0 (Valid, but it's a network address)
    • B) 192.168.13.255 (Valid, but it's a broadcast address)
    • C) 1.27.14.254 (Valid)
    • D) 192.168.256.1 (Invalid, 256 is out of range)
    • Answer: A, B, C

  9. What is the term for the hardware coded address found on an interface?

    • Answer: C) MAC Address

  10. Mark the correct configuration on client PC to access the Internet:

    • A) IP:192.168.2.115/24 gateway: 192.168.2.1 (Valid)
    • B) IP:192.168.2.2/24 gateway:202.168.125.45 (Invalid, gateway should be local)
    • C) IP:192.168.0.1/24 gateway:192.168.2.1 (Invalid, wrong subnet)
    • D) IP:192.168.2.253/24 gateway:202.168.0.1 (Invalid, gateway should be local)
    • E) IP:192.168.1.223/24 gateway:248.115.148.136 (Invalid, wrong subnet)
    • Answer: A

  11. MAC layer by OSI model is also known as:

    • Answer: E) Layer 2

  12. The network address is:

    • Answer: D) The first address of the subnet

  13. Collisions are possible in full-duplex Ethernet networks:

    • Answer: False (Collisions are not possible in full-duplex)

  14. The basic unit of a physical network (OSI Layer 1) is the:

    • Answer: A) Bit

  15. How many usable IP addresses are there in a 20-bit subnet?

    • Answer: E) 4094 (2^12 - 2 = 4094)

  16. Which of the following is NOT a valid MAC Address?

    • Answer: A) 80:GF:AA:67:13:5D (Invalid, contains non-hex character)

  17. Which of the following protocols / ports are used for SNMP:

    • Answer: D) UDP 162, E) TCP 161, F) UDP 161

  18. Select valid subnet masks:

    • Answer: B) 255.255.224.0, D) 255.192.0.0

  19. How many IP addresses can one find in the header of an IP packet?

    • Answer: A) 2 (Source and Destination IP addresses)

  20. How many layers does Open Systems Interconnection model have?

    • Answer: E) 7

Feel free to ask if you have any further questions!