After 8.1.

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Presentation transcript:

After 8.1

What PDU is used at layer 3? Bits Packet Segment Frame Something else 1 of 3

What PDU is used at layer 1? Bits Packet Segment Frame Something else 2 of 3

Which function is not part of layer 1? Physical and electrical properties of the media Mechanical properties of the connectors Routing Representation of bits on the media Encoding of control signals 3 of 3

After 8.2

An Ethernet switch is labeled “100 Mbps”. What is that value? Bandwidth Throughput Goodput Frequency Bit time

This Windows box shows a speed of 27.7 MB/second. What is that value? Bandwidth Throughput Goodput Frequency Bit time

What technique uses 10 bits to encode a single byte? AM 4B/5B Manchester NRZ FM

Which technique signals a 1 with a low-to-high voltage transition and a 0 with a high-to-low voltage transition? 4B/5B Optical Manchester NRZ AM

Which technique is so slow that it can't even transmit 10 Mbps? AM Optical Manchester NRZ 4B/5B

After 8.3

Which standard allows segment lengths up to 80 km? 10BASE-T 100BASE-TX 100BASE-FX 1000BASE-T 10GBASE-ZR

Which standard is the slowest? 10BASE-T 100BASE-TX 100BASE-FX 1000BASE-T 10GBASE-ZR

Which standard is used by normal voice-only cell phones? 802.15 802.11 802.16 GSM 802.3

Which wireless technology is the slowest? 802.11a 802.11b 802.11g 802.11n 802.15

Error in the Curriculum! 8.3.6 says "Because light can only travel in one direction over optical fiber, two fibers are required to support full duplex operation" WRONG Light can travel both directions simultaneously through glass--we all know that. Two fibers are used merely as a convenience, to make the receivers and transmitters cheaper.