CCENT Cisco Certified Entry Networking Technician Study Guide: (ICND1 Exam 640-822), 2nd Edition

Chapter 1: Internetworking

1. D. A receiving host can control the transmitter by using flow control (TCP uses Windowing by default). By decreasing the window size, the receiving host can slow down the transmitting host so the receiving host does not overflow its buffers.
2. A, D. An Ethernet frame has source and destination MAC addresses, an Ether-Type field to identify the Network layer protocol, the data, and the FCS field that holds the answer to the CRC.
3. C, D. Not that you really want to enlarge a single collision domain, but a hub (multi-port repeater) will provide this for you.
4. D. The Transport layer receives large data streams from the upper layers and breaks them up into smaller pieces called segments.
5. A, C, E, G. Routers provide packet switching, ...