单选题 A(n) ＿＿＿＿＿＿＿＿ is usually a computer installed with the necessary software and allows two networks, each with a completely different set of protocols, to communicate. 的答案

成人教育远程网络教育函授网上考试【计算机专业英语】课程在线考试模拟试题正确答案解析，免费查看【计算机专业英语】作业答案。
题目内容：
A(n) ＿＿＿＿＿＿＿＿ is usually a computer installed with the necessary software and allows two networks, each with a completely different set of protocols, to communicate.
题目选项

gateway