PyQdeck LogoPyQdeckSubjectsSyllabusBlog
Back to the 2024 paper

Module 3: Network Layer & Routing

20242m

Which of the following is correct IPv4 address?
(i) 124.201.3.1.52
(ii) 300.142.210.64
(iii) 01.200.128.123
(iv) 128.64.0.0

Search GoogleAsk AI
Worked SolutionAI Assisted

Answer: (iv) 128.64.0.0

A valid dotted-decimal IPv4 address has exactly four octets separated by three dots, every octet in the range 0-255, and no leading zeros (a leading zero would be read as octal).

  • (i) 124.201.3.1.52 has five octets, so it is not a 32-bit dotted-decimal address.
  • (ii) 300.142.210.64 contains the value 300, which exceeds 255.
  • (iii) 01.200.128.123 begins with a leading zero, which is invalid/ambiguous.
  • (iv) 128.64.0.0 has four octets, each within 0-255, so it is a legal IPv4 address (it is also a Class B address).

Similar questions

Computer NetworksWhich one of the following is a valid host for network 192.168.4.32/68? (i) 192.168.4.39 (ii) 192.168.4.50 (iii) 192.168.4.47 (iv) 192.168.4.3120232mComputer NetworksWhat is the default subnet mask for a class A network? (i) 127.0.0.1 (ii) 255.0.0.0 (iii) 255.255.255.0 (iv) 255.255.255.020202mComputer NetworksAn Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20 The ISP wants to give half of this chunk of addresses to organization A, and a quarter to organization B, while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B? (i) 245.248.136.0/21 and 245.248.128.0/22 (ii) 245.248.128.0/21 and 245.248.128.0/22 (iii) 245.248.132.0/22 and 245.248.132.0/21 (iv) 245.248.136.0/22 and 245.248.132.0/2120202mComputer NetworksWhich one of the following protocols is NOT used to resolve one form of address to another one? (i) DNS (ii) ARP (iii) DHCP (iv) RARP20162m
PreviousWhich of the following cannot be used as a medium for 802.3 ethernet? (i) A thin coaxial cable (ii) A microwave link (iii) A twisted pair cable (iv) A fiber optical cableNextThe checksum in IP must be recomputed at every router because of change in ____ fields. (i) TTL, Options, Identification Number, Offset (ii) TTL, Options, Data, Offset (iii) TTL, Options, Datagram Length, Offset (iv) TTL, Header Length, Offset, ToS
Official AppAndroid App

PYQDeck for Android

Solve BEU previous-year exam papers anywhere, anytime. Fast search, offline paper viewing, and step-by-step solutions designed specifically for your phone.

Get on Google Play