IPTools
Networking tutorials — subnetting and practical exercises
Learn IPv4, IPv6, CIDR, VLSM and DHCP through clear examples. Beginner-friendly guides to networking and CCNA fundamentals.
IPv4 subnetting tutorial — masks, networks and hosts
IPv4 addresses, masks, CIDR prefixes, network and broadcast addresses, with /24, /26, /31 and /32 examples.
Read guide →02 / GuideIPv6 tutorial — notation, prefixes and subnetting
IPv6 structure, RFC 5952 notation, prefixes, address types, SLAAC, DHCPv6, DNS, and URLs.
Read guide →03 / GuideCIDR explained — prefixes, masks and route aggregation
Convert prefixes and masks, find block boundaries, split networks, and aggregate routes safely.
Read guide →04 / GuideVLSM tutorial — a worked subnet planning example
Plan different-sized subnets, choose prefixes, align blocks, and work through a complete /24 example.
Read guide →05 / GuideDHCP explained — DORA, leases and address pools
DHCPv4 messages, options, lease renewal, relay, pool planning, troubleshooting, and security.
Read guide →06 / GuideCCNA foundations — study plan and your first network
A study map aligned with the current Cisco 200-301 CCNA v1.1 exam and the announced v2.0 transition.
Read guide →07 / GuideDownload time explained — Mbps, MB/s and MiB
Calculate transfer duration, distinguish bits from bytes and MB from MiB, and account for link efficiency with worked examples.
Read guide →