Which layer is responsible for delivering data across a single hop? A. The network layer B. The transport layer OC. The transport layer D. The wire layer E. The control layer F The link layer You update your link layer from 10Mb/s Ethernet to 10Gb/s Ethernet. Which of the following changes also need to be made? Check all that apply. A. Upgrade from half-duplex TCP to full-duplex TCP B. Update the UDP header to support 10Gb/s mode C. None of the above D. Update from IPv4 to IPv6 Suppose you send a web request (HTTP) over TCP over IP over Ethernet. The first byte of the Ethernet payload is O A. An IP packet header B. Part of an HTTP request C. A TCP transport segment header D. An Ethernet frame header