Practice: networks rapid-fire and subnetting drill
50 min · Intermediate
Networking rounds reward speed and precision: short exact answers, quick subnetting and one well-structured long answer. Each drill below is timed; try it before reading the answers, then score yourself with the sheet at the end.
Topics in this lesson
- Round 1: 20 rapid-fire questions (6 minutes)
- Round 2: subnetting numericals (10 minutes)
- Round 3: the URL journey in two minutes
- Round 4: fix the wrong answers, then score yourself
Interview questions this lesson answers
- Name the seven OSI layers from the bottom.
- Which layers does the TCP/IP model have?
- Segment, packet or frame: which belongs to which layer?
- Which device works at layer 2 and which at layer 3?
- What are the three private IPv4 ranges?
- How many usable hosts in a /25 and a /28?
- What is the subnet mask of /21?
- Why do we subtract 2 from the host count?
- What does ARP do?
- What does DHCP give a device?
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