On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?
A. The local routing information may be corrupted and must be re-validated using a routing protocol.
B. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.
C. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.
D. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.
題解
「route」指令用來顯示或是管理IP路由表。如果直接執行「route」指令，會去向網域名稱伺服器查詢IP所對應的主機名稱。如果網域名稱伺服器出問題，將會有逾時的情況發生，所以答案是選項D。若要避免這個問題，加上「-n」參數直接顯示IP就好。