internet - Network connection in terminal is too slow - Ask Ubuntu

i running wi-fi connection of our university residential hall. when browse internet or download 300 kbps speed.

but in terminal connection slow , gets slower & gradually tends 0 kbps i.e. "no internet". in average 4kbps speed case. apt update, wget, curl, composer --- slow cannot complete "apt-get update" command.

before, problem did not occur recently, upset now.
i cannot install terminal.
n. b. firewall disabled default.

well have change mirror gets data. go software & update --> select download from: other --> choose select best server/ or server prefer! cheers:)