BitWithBiteCCNA Networking · Quick Reference
Module 17 — Build a Small Network Cheat Sheet
In one line: Designing a small network starts with the same questions every time: how many devices need to connect, how much growth is expected, and what level of redundancy is justified by ...
Key Ideas
1Devices in a Small Network. Designing a small network starts with the same questions every time: how many devices need to connect, how much growth is expected, and what level of redundancy is jus...
2Applications, Protocols, and Scaling. A small network typically runs a predictable mix of applications and protocols — almost everything covered across this entire course shows up here in practice: DNS and...
3Verify Connectivity. Ping and traceroute return throughout this entire course because they remain the fastest way to confirm a network is behaving as expected — and the extended versions o...
4Host and IOS Commands. A short reference of the commands used most often across every operating system and Cisco device, gathered in one place since real troubleshooting jumps between all of...
5Troubleshooting Methodologies. Random guessing wastes time. A structured approach — even a simple one — consistently resolves issues faster than jumping straight to assumptions.
Code Examples
Network Services: DHCP (addressing), DNS (name resolution)
Productivity: HTTP/HTTPS (web), SMTP/IMAP (email), FTP/SFTP (files)
Voice & Video: SIP/RTP-based VoIP, video conferencing — latency-sensitive, often UDP
Management: ...
! Extended ping lets you control packet count, size, source interface, and timeout
R1# ping
Protocol [ip]: ip
Target IP address: 8.8.8.8
Repeat count [5]: 100
Datagram size [100]: 1500
Source address: 192.168.1.1
! Extended traceroute offers simila...
! Windows — view IP configuration
C:\> ipconfig /all
! Linux — view IP configuration
$ ip addr show
! macOS — view IP configuration
$ ifconfig
! Any OS — view the local ARP table
$ arp -a
! Cisco IOS — discover directly connected Cisco de...