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zoo:diagnosticsmac [2020/08/14]
127.0.0.1 external edit 		zoo:diagnosticsmac [2021/07/22]
127.0.0.1 external edit
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 2. **Lookup:** The DNS Lookup diagnostic utility displays information that you can use to diagnose Domain Name System (DNS) infrastructure. 2. **Lookup:** The DNS Lookup diagnostic utility displays information that you can use to diagnose Domain Name System (DNS) infrastructure.
 {{:zoo:nu_lookup.png?640|Lookup}} {{:zoo:nu_lookup.png?640|Lookup}}
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 3.  **Traceroute:** The Trace Route diagnostic utility determines the route taken to a destination by sending Internet Control Message Protocol (ICMP) echo packets with varying IP Time-To-Live (TTL) values to the destination. Each router along the path is required to decrement the TTL on a packet by at least 1 before forwarding it, so the TTL is effectively a hop count. When the TTL on a packet reaches 0, the router should send an ICMP Time Exceeded message back to the source computer. 3.  **Traceroute:** The Trace Route diagnostic utility determines the route taken to a destination by sending Internet Control Message Protocol (ICMP) echo packets with varying IP Time-To-Live (TTL) values to the destination. Each router along the path is required to decrement the TTL on a packet by at least 1 before forwarding it, so the TTL is effectively a hop count. When the TTL on a packet reaches 0, the router should send an ICMP Time Exceeded message back to the source computer.
zoo/diagnosticsmac.txt ยท Last modified: 2023/11/28 by brian

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