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Cheat Sheet

May 24, 2026

Cisco CCST Networking cheat sheet for 100-150 exam facts, network concepts, addressing, media, infrastructure, diagnostics, security, and final review traps.

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Use this cheat sheet for fast CCST Networking review before a practice block or exam-day recap.

Current exam facts

I verified these Cisco facts on May 24, 2026.

Item Value
Exam 100-150 CCST Networking
Certification Cisco Certified Support Technician Networking
Duration 50 minutes
Price 125 USD
Languages listed English, Arabic, Chinese, Spanish, French, Japanese, Portuguese
Positioning Entry networking support and first step toward CCNA

CCST proof stack

  1. Symptom: what did the user or engineer report?
  2. Scope: one endpoint, one switch port, one VLAN, one site, one application, or many users?
  3. Layer: physical, wireless, addressing, DNS, gateway, route, firewall, or application?
  4. Evidence: light, cable, IP config, ping, traceroute, DNS lookup, packet capture, show command, or ticket history?
  5. Action: safe support step, documentation, or escalation?

Fast distinctions

Pair Difference
Bandwidth vs throughput capacity vs actual delivered rate
Switch vs router same-LAN forwarding vs between-network forwarding
DNS vs DHCP names to addresses vs address configuration
ARP vs routing local IP-to-MAC mapping vs path between networks
Public vs private address internet-routable vs internal-only addressing
IDS/monitoring vs firewall detect/observe vs filter traffic

Diagnostic command map

Need Start with
local IP settings ipconfig, ifconfig, or ip addr
basic reachability ping
path toward destination traceroute or tracert
DNS behavior nslookup or dig
packet-level evidence Wireshark capture
Cisco interface summary show ip interface brief
routing table show ip route
switch MAC learning show mac address-table
neighboring Cisco devices show cdp neighbors

Final traps

  • Do not reconfigure before checking physical link, addressing, gateway, DNS, and scope.
  • Do not treat Wi-Fi, cellular, and wired access as interchangeable.
  • Do not confuse a firewall block with a routing failure without evidence.
  • Do not escalate with “network down” only; include command output and observations.
Revised on Monday, June 15, 2026
6. Security
Study Plan