Data Communications Networking Devices - 4th Ed.pdf

266 __________________________________________________________ WIDE AREA NETWORKS2.4.15 Assume congestion occurred on a frame relay network. What two bits in the framerelay header would be set when frames ¯ow through a switch experiencing congestion?2.4.16 How does a frame relay network handle errored frames?2.4.17 What is the relationship between the CIR, the measurement interval T c ) and thecommitted burst size B c ) on a frame relay network?2.4.18 What value does the sum of the committed burst size B c ) and excess burst size B e )represent?2.4.19 When voice is transported over a frame relay network, why is it important to placeframes transporting voice in a FRADs queue ahead of frames transporting data?2.5.1 What is the only protocol suite supported on the Internet?2.5.2 What are two key differences between TCP and UDP?2.5.3 Is TCP/IP a WAN, a LAN, or a combined WAN and LAN protocol?2.5.4 What is the primary purpose of data fragmentation?2.5.5 What layers in the TCP/IP protocol suite are responsible for the division of a messageinto datagrams and message fragmentation?2.5.6 What is the purpose of the Address Resolution Protocol ARP)?2.5.7 How would you identify TCP segments containing a ®le transfer and a Telnet session¯owing on the same transmission path?2.5.8 What ®eld in the TCP header provides a ¯ow control mechanism?2.5.9 Explain how the altering of a TCP windows ®eld value can be used to control the ¯owof information.2.5.10 Explain the relationship between port addresses contained in the TCP or UDPheader and IP address with respect to the transmission and delivery of different applicationdata between two computers.2.5.11 How is a datagram prevented from wandering the Internet forever?2.5.12 How does an IP datagram indicate the higher layer protocol used to create a messagecarried in the datagram?2.5.13 Discuss the relationship between the number of network identi®ers that can bede®ned on Class A, Class B, and Class C addresses.2.5.14 Explain why a maximum of 254 devices can be assigned addresses on a Class Cnetwork even though the host portion of a Class C address is 8 bits in length.2.5.15 What device is responsible for providing a translation between a device's near-English domain name and its IP address?