Myujth

コネクションレス型通信 とは、 Datagram （データグラム）とも呼ばれる、経路確保などの事前のやり取り（コネクションの確立）無しに、データ送信を開始するパケット通信の方式である。 TCP/IPにおけるUDPで用いられている。 特徴 Virtual Callと比較して、以下の点が特徴である。 通信プロトコル...

2 My parents have started to have a problem printing from their PC, and naturally as the go-to IT expert, I have been drafted in to have a look! Before they went on holiday a month ago, it was apparently working fine. On their return last week, they were unable to print. I believe windows updates were installed on their return. I have removed the printer, an HP C4400, and uninstalled all related software, then re-installed the software and drivers. When re-adding the printer, the HP install software hangs at "detecting printer". In device manager, I see a "USB Composite Device" appearing, however this shows a yellow warning, with a message stating that the composite device drivers are missing or corrupt. I have tried adding a different model of printer, with the same result - it appears as a composite USB device, with errors. I have also tried connecting the printer to another PC, and it installed and worked perfectly. Any suggestions? How can I repair ...

-3 var element = document.getElementsByClassName('nav-download')[0]; console.log(element); The class nav-download returns undefined for me in console.log. I wanted to know how to handle this. javascript share | improve this question edited Nov 12 at 19:25 montrealist 2,958 7 35 49 asked Nov 12 at 19:17 João Filipe 1 1 Can you include the HTML as well – Sushanth -- Nov 12 at 19:19 2 Please only use English on StackOverflow. – connexo Nov 12 at 19:23 add a comment  |  -3 var element = document.getElementsByClassName('nav-download')[0]; console.log(element); The class nav-download returns undefined for me in console.log. I wanted to know how to handle this. javascript share | improve this question edited Nov 12 at 19:25 montrealist 2,958 7 35 49 asked Nov 12 at 19:17 João Filipe 1 1 Can you...