“Arista data planes support these packet forwarding modes:
Store and forward: the switch accumulates entire packets before forwarding them.
Cut through: the switch begins forwarding frames before their reception is complete.”
I've had it happen in an interview, many years ago. I told him we'd have to agree to disagree. After I was hired, he admitted he looked it up and I was correct (some weird SQL question he asked.)
Comments
So he didn't want to google it?
If you Google it, you find many copies of theory, but not a single reference to a cut-through switch ever existing in real life.
What "real life" are you living in? The references in https://en.wikipedia.org/wiki/Cut-through_switching already link to several. Here's a few more from all the major vendors.
Cisco:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/ne...
HPE Aruba:
https://arubanetworking.hpe.com/techdocs/AOS-CX/AOSCX-CLI-Ba...
Fortinet:
https://docs.fortinet.com/document/fortiswitch/7.2.7/adminis...
Arista:
https://arista.my.site.com/AristaCommunity/s/question/0D55w0...
Nvidia/Mellanox:
https://enterprise-support.nvidia.com/s/article/switch-forwa...
Extreme Networks:
https://documentation.extremenetworks.com/Switch%20Engine%20...
From Arista documentation:
“Arista data planes support these packet forwarding modes: Store and forward: the switch accumulates entire packets before forwarding them. Cut through: the switch begins forwarding frames before their reception is complete.”
You sure? There is one described here: https://en.wikipedia.org/wiki/Cut-through_switching (Kalpana switch from the early 90's)
I see you've never had a run-in with a blowhard in a position of power. Lucky.
I've had it happen in an interview, many years ago. I told him we'd have to agree to disagree. After I was hired, he admitted he looked it up and I was correct (some weird SQL question he asked.)
After I was hired, he admitted he looked it up and I was correct
The best possible outcome.
“So he didn't want to google it?”
No, he didn’t want interrupt the interview to start checking out phones.
“I told him we'd have to agree to disagree.”
That’s where I went wrong. But I like to think learned my lesson.