Computer Networks · Question 21 · Medium
What is the subnet mask, in dotted-decimal form, for a /28 prefix?
- 255.255.255.240
- 255.255.255.248
- 255.255.255.224
- 255.255.240.0
Answer and explanation
Answer: A. 255.255.255.240
Explanation: /28 means 28 one-bits: 24 for the first three octets and 4 in the last octet, which is 11110000 = 240.
Previous: How many bits long is an IPv6 address? · Next: What is the network address of the host 172.16.45.200/20?
Practise computer networks
Try a fresh set of computer networks questions with an explanation after every answer, free and without signing up: Computer Networks practice. Or sit a full placement mock test.
More computer networks questions
- Which OSI layer is responsible for data representation tasks such as…
- Which protocol automatically assigns an IP address, subnet mask and default…
- How many bits long is an IPv6 address?
- What is the network address of the host 172.16.45.200/20?
- A Selective Repeat ARQ protocol uses 4-bit sequence numbers. What is the…
- How long does it take to transmit (put on the wire) a 1,500-byte packet on a…
- What is the maximum throughput (channel efficiency) of slotted ALOHA?
- The network 192.168.5.0/24 must be divided into equal-sized subnets, each with…
- Using CRC with the generator polynomial x^3 + x + 1 (bits 1011), what…
- On a link, transmitting one frame takes 1 ms and the one-way propagation delay…
More technical & programming practice
Software Engineering · Cloud & DevOps · GenAI Basics · Pseudo-code · C Programming · Java · Python · Data Structures
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge