Port Number Rush
Sixty seconds to match services to their well-known TCP and UDP ports — and back again. These come up constantly in ACLs, in troubleshooting, and in the exam.
How to get faster
Group them instead of memorising a flat list. The mail cluster: SMTP 25, POP3 110, IMAP 143. The remote access cluster: SSH 22, Telnet 23, RDP 3389. The management cluster: SNMP 161, syslog 514, NTP 123. And the pairs that trip people up — TFTP is 69/UDP while FTP is 20/21 TCP, and DHCP uses 67 on the server, 68 on the client.
Reference: TCP/UDP port reference · what is a port number.
More games
Subnetting Sprint
Network, broadcast, hosts and masks against the clock.
Play →60 secondsSubnet Mask Match
Turn any /prefix into its dotted-decimal mask, fast.
Play →Speed is practice. Skill is the rack.
These drills build the recall speed the CCNA exam demands. The job demands more — configuring real routers and switches until it is second nature. That is what we teach in Ahmedabad, on real Cisco hardware.