For Surveillanace and Security which techology is more Better wireless or wired?
Wired is always better in terms of reliability [1] and bandwidth, but of course unless you are building/rebuilding, is not always practical.
[1] wifi is just another thing to fail, or be subject to interference.
[2] the most recent wifi standards will have good throughput, but none of them are up to GigE standard and see also [1]