CCNA 200-301 v1.1 quick lookup
Quick Lookup tables
Cross-topic lookup collections assembled from the same blocks the articles use — no duplicated values.
Protocol numbers and portsIPv4 masks and block sizesIPv6 address spaceRouting codes and administrative distancesSyslog levels and thresholdsProtocol defaults and timers
Protocol numbers and ports
IP protocol numbers and the TCP/UDP port numbers used across the blueprint, with the services that own them.
IPv4 masks and block sizes
Prefix lengths, dotted-decimal and wildcard masks, block sizes and usable host counts including the /31 and /32 caveats.
IPv6 address space
Unicast scopes, special addresses and the multicast groups that appear in verification output.
Routing codes and administrative distances
The protocol codes shown by the routing table and the default administrative distances they imply.
Syslog levels and thresholds
Severity levels in order, the keywords IOS accepts, and the inclusive behavior of logging thresholds.
Protocol defaults and timers
Default timers and behaviors worth memorizing, with the platform and protocol qualifications that apply.