In nslookup output, what does the 'Server:' line indicate?

The default gateway of the local machine

The IP address of the destination host

The DNS server that provided the answer

A network administrator is troubleshooting a connectivity issue between two offices connected by a WAN link. From Office A, they run `tracert 10.20.30.1` (the gateway at Office B). The output shows: Hop 1: 10.10.10.1 1 ms, Hop 2: 10.10.20.1 5 ms, Hop 3: * * *, Hop 4: * * *, Hop 5: 10.20.30.1 200 ms. The administrator suspects the WAN link is degraded. What additional information would BEST confirm this?

Run `arp -a` to check the ARP cache.

Run `ping 10.20.30.1 -n 100` to check for packet loss.

Run `nslookup 10.20.30.1` to verify DNS resolution.

Run `ipconfig /all` on the workstation to verify IP configuration.

What does the ping command primarily send to test network connectivity?

TCP SYN packets to a specified port

ARP requests to the default gateway

UDP datagrams to a random high port

A Linux administrator runs `ip addr show` on a server and sees the following output for interface eth0: `inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0` and `state UP`. The server cannot ping the default gateway at 192.168.1.1. What is the MOST likely cause?

The server's subnet mask is incorrect.

The server's DNS settings are misconfigured.

The server's MAC address is incorrect.

The server has no default route configured.

An nslookup query for 'www.example.com' returns 'Non-existent domain'. What does this indicate?

The hostname does not exist in DNS

The DNS server is returning a cached result

CiscoCertified Support Technician (CCST) Networking

Domain 5Objective 3

5.3. Run Basic Diagnostic Commands and Interpret the Results. 100-150 Practice Questions (Page 1)

Part of the Diagnosing Problems domain, which makes up ~21% of our current practice bank. Cisco does not publish an official question count, but from its 50-minute exam (~20–35 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 39 practice questions to prepare you well beyond it. (estimate)

39questions here

8free pages

9concepts

Questions 1–5

1foundation · easy
In nslookup output, what does the 'Server:' line indicate?
Select an answer first
2expert · hard
A network administrator is troubleshooting a connectivity issue between two offices connected by a WAN link. From Office A, they run `tracert 10.20.30.1` (the gateway at Office B). The output shows: Hop 1: 10.10.10.1 1 ms, Hop 2: 10.10.20.1 5 ms, Hop 3: * * *, Hop 4: * * *, Hop 5: 10.20.30.1 200 ms. The administrator suspects the WAN link is degraded. What additional information would BEST confirm this?
Select an answer first
3foundation · easy
What does the ping command primarily send to test network connectivity?
Select an answer first
4application · medium
A Linux administrator runs `ip addr show` on a server and sees the following output for interface eth0: `inet 192.168.1.100/24 brd 192.168.1.255 scope global eth0` and `state UP`. The server cannot ping the default gateway at 192.168.1.1. What is the MOST likely cause?
Select an answer first
5foundation · easy
An nslookup query for 'www.example.com' returns 'Non-existent domain'. What does this indicate?
Select an answer first

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