CompTIA · Linux+ XK0-006
Network issues
Linux+ XK0-006 · Lesson 27 of 28 · 3:47:04
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In this lesson
Prepare for the Linux+ XK0-006 exam (CompTIA Linux+ V8). In this lesson: a layer-by-layer method: link and interface problems (negotiation, MTU mismatch, MAC spoofing), addresses and routes (IP conflicts, dual stack), DNS and DHCP issues, and firewalls and services, with Pinecrest Media, a fictional video streaming company, as the running example. Includes three original practice questions.
Preview the topics
- After a switch was replaced, small pings to the storage server work, but large file copies hang. ping -M do -s 1472 fails. What is the likely cause?
- web02 reaches the catalog server by its address, but not by its name, and another host resolves the name fine. What should the admin check first?
- From the office, nobody reaches the catalog on port 443, but ping works. On the server, ss shows nginx listening on all addresses, and tcpdump sees the requests arrive, with no reply. What should the admin check?