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jonathanjo

Once upon a time a computer programmer I have been connecting networks since the 1980s. Nowadays mostly management consultancy but still have to be practical from time to time.

189 answers
7 questions
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  • Member for 11 months
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  • Last seen 9 hours ago

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Top Posts (196) All Questions Answers | Votes Newest

20 Where is Ping's “round-trip time” stored in the IP header? Sep 14
11 Why couldn't a nework address be used as as broadcast address as well? May 21
7 Do VLANs with no ACL assigned block inter-VLAN traffic by default? Aug 6
6 RJ45 console cable specs Aug 14
6 How physical addresses change hop to hop? Mar 26
6 How does Ethernet Switch ensures the validity of the MAC address table? Mar 16
6 Why preamble is not considered a part of the Ethernet Header? Nov 9 '17
5 Show interfaces brief information Aug 28
5 Why are DHCP ACK and REQ messages broadcast in Link Layer? Aug 18
5 Can I see what happens when I run a DNS query? Aug 11
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