Network Services Management Flashcards
7 cards from real ACSP practice questions. Tap to flip, then mark Knew It or Still Learning โ missed cards come back until you master them.
Read the first 7 Network Services Management flashcards as text
A user reports that their Mac can browse the web but cannot connect to a local SMB file server by hostname. Pinging the server by IP succeeds. What is the most likely cause?
Answer: DNS is not resolving local hostnames
When IP connectivity works but hostname resolution fails, DNS is not returning the correct local record for that hostname.
Which macOS command-line tool can be used to flush the DNS cache?
Answer: dscacheutil -flushcache && killall -HUP mDNSResponder
On macOS, flushing the DNS cache requires clearing the local cache with dscacheutil and signaling mDNSResponder to reset.
A Mac is configured with a manual IP address but loses network access after another device joins the network. What is the most likely issue?
Answer: There is an IP address conflict
When a manually configured IP is also assigned by DHCP to another device, an IP conflict causes both machines to lose reliable connectivity.
In macOS, where can an administrator configure a Mac to use a specific DNS server for a particular network interface?
Answer: System Settings > Network > [Interface] > Details > DNS
The DNS tab within an interface's Details pane in Network settings allows per-interface DNS server configuration.
A Mac using Wi-Fi shows a self-assigned IP address (169.254.x.x). What does this indicate?
Answer: The DHCP server did not respond
A 169.254.x.x address is an APIPA address assigned by the OS when DHCP lease acquisition fails.
Which protocol does macOS use to discover services like printers and file shares on a local network without requiring a DNS server?
Answer: Bonjour (mDNS)
Bonjour uses multicast DNS (mDNS) over port 5353 to advertise and discover services on the local subnet without a central DNS server.
An IT administrator needs to test whether TCP port 443 is open on a remote server from a Mac. Which command is most appropriate?
Answer: nc -zv server.example.com 443
The netcat (nc) command with -zv flags performs a port scan verbosely without sending data, confirming whether TCP port 443 is open.