After 7.1 Last modified 9-21-10

What OSI model layer is responsible for dividing and managing communications between the processes running in the two end systems? Application, Presentation, or Session Transport Network Data Link Physical

What is the correct term for a PDU at the Data Link layer of the OSI Model? Packet Segment Frame Message Data

This frame contains a “Type: IP (0x0800)” field This frame contains a “Type: IP (0x0800)” field. Which part of the OSI model put that value on the frame? Transport Network Logical Link Control Media Access Control Physical

Which part of the OSI model adds start and stop bit patterns to a frame? Transport Network Logical Link Control Media Access Control Physical

After 7.2

What media access control method is used by 802.11 wireless networks? Controlled Access CSMA CSMA/CD CSMA/CA None

Which type of network needs no media arbitration at the Data Link layer? Point-to-point Full Duplex Point-to-point Half Duplex Ring Multi-Access Ethernet

Which type of network resolves collisions by CSMA/CD? Point-to-point Full Duplex Point-to-point Half Duplex Ring Ethernet connected with a hub Ethernet connected with a switch

After 7.3

When PC0 sends a PING to PC3, how many different physical addresses are used to send the data? 1 2 3 4 5 or more

What portion of the frame contains the CRC? Layer 3 header Layer 3 trailer Layer 2 header Layer 2 trailer None of the above

Which Data Link protocol uses explicit acknowledgements to ensure that each frame was delivered? Ethernet PPP 802.11 All of the above None of the above

PC1 sends a PING to PC2 with TTL=32 PC1 sends a PING to PC2 with TTL=32. What TTL does it have when it reaches PC2? 31 or more 30 29 28 27 or less