[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [Z] UDP (User Datagram Protocol) access list 2nd 3rd 4th unequal cost load sharing unequal-cost load balancing IGRP troubleshooting 2nd 3rd 4th 5th unicast updates RIP (Routing Information Protocol) 2nd 3rd 4th unreliable delivery Update process IS-IS 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th update timers IGRP (Interior Gateway Routing Protocol) RIP (Routing Information Protocol) updates distance vector routing protocols 2nd 3rd dynamic routing protocols a asynchronous triggered 2nd EIGRP (Enhanced Interior Gateway Routing Protocol) 2nd OSPF (Open Shortest Path First) 2nd RIP (Routing Information Protocol) 2nd IGRP comparisons unicast 2nd 3rd 4th RIPv2 invalid 2nd Urgent Pointer TCP User Datagram Protocol, see UDP |