Which statement regarding WANs is true?關於 WAN，下列哪項敘述正確？
Match each WAN device to its function.請將每個 WAN 裝置與其功能配對。
| modem數據機（modem） | provides a digital interface for DTE to connect to digital WAN circuits為 DTE 提供連接數位 WAN 電路的數位介面 |
| router路由器 | converts digital signals for sending over analog circuits將數位訊號轉換為可透過類比電路傳送的訊號 |
| core router核心路由器 | used in LANs to provide ports that interface to WANs用於區域網路中，提供連接 WAN 的連接埠 |
| CSU/DSUCSU/DSU | part of the service provider network and used in "building" a WAN屬於服務提供者網路的一部分，用於「建置」WAN |
Which three options are classified as internet-based WAN connectivity options? (Choose three.)下列哪三個選項屬於以網際網路為基礎的 WAN 連線方式？（選三項。）
Which two statement about VPNs are true? (Choose two.)關於 VPN，下列哪兩項敘述正確？（選兩項。）
Which statement about site-to-site VPN deployment mode is true?關於站對站（site-to-site）VPN 部署模式，下列哪項敘述正確？
Which two statements about provider-managed VPNs are true? (Choose two.)關於服務提供者管理的 VPN，下列哪兩項敘述正確？（選兩項。）
Which two options are site-to-site VPN options? (Choose two.)下列哪兩個選項屬於站對站 VPN 選項？（選兩項。）
Which optical technology provides highest data rates?哪種光纖技術可提供最高的資料速率？
Which of the basic ISP connectivity types provides the highest redundancy?在基本的 ISP 連線類型中，哪一種可提供最高的備援性？
Which wired broadband internet access technology option uses twisted-pair telephone lines for transport?哪種有線寬頻網際網路存取技術是使用雙絞電話線來傳輸的？