Final answer:
The 'no auto-summary' command is used in routing contexts to disable automatic summarization, which leads to a more accurate representation of routes in a network's routing table.
Step-by-step explanation:
The command 'no auto-summary' is used in routing protocols to disable automatic summarization of subnet routes into network-level routes. When using routing protocols like RIP (Routing Information Protocol), automatic summarization is often enabled by default. This can lead to inefficiencies and inaccuracies in routing decisions, particularly in networks with complex topologies or varying subnet sizes. By issuing the 'no auto-summary' command, a network administrator ensures that the routing protocol advertises and propagates routes without summarizing them, leading to a more precise and potentially more efficient routing table.