Question
A network administrator receives a ticket from one of the company's offices about video calls that work normally for one minute and then get very choppy. The network administrator pings the video server from that site to ensure that it is reachable:
```
Ping 10.172.16.16
Pinging 10.172.16.16 with 32 bytes of data:
Reply from 10.172.16.16: bytes=32 time=40ms TTL=53
Reply from 10.172.16.16: bytes=32 time=11ms TTL=53
Reply from 10.172.16.16: bytes=32 time=672ms TTL=53
Reply from 10.172.16.16: bytes=32 time=111ms TTL=53
Reply from 10.172.16.16: bytes=32 time=117ms TTL=53
Reply from 10.172.16.16: bytes=32 time=849ms TTL=53
Reply from 10.172.16.16: bytes=32 time=34ms TTL=53
Reply from 10.172.16.16: bytes=32 time=92ms TTL=53
```
Which of the following is most likely the cause of the video call issue?
- A. Throughput
- B. Jitter Correct
- C. Latency
- D. Loss
Explanation
Every ping gets a reply, so there is no packet loss, but the round-trip times swing widely from 11 ms to 849 ms. That variation in delay between packets is jitter, and real-time traffic such as video calls becomes choppy when packets arrive at irregular intervals. Latency alone would show consistently high times rather than large swings, and nothing in the output points to a throughput limit.
