1. How is the decimal value 10 represented in binary? A. 1010
2. How many bits is a MAC address? A. A MAC, or hardware, address is a 48‐bit (6‐byte) address written in hexadecimal format
3. How many devices in a collision domain have to listen when a single host talks? A. When one device sends a packet out on a network segment, all other devices on the same physical network segment must wait and let it be transmitted
4. How many wire pairs are used with 100Base‐T full duplex? A. Full-duplex Ethernet uses two pairs of wires at the same time
5. How many wire pairs are used with half duplex? A. With half duplex, you are using only one wire pair with a digital signal either transmitting or receiving
6. If you are using a cable medium called 100Base‐TF, what does this mean? A. 100Base‐TF means that you have an Ethernet over fiber cable implementation
7. On an Ethernet switched network, what address does one host computer use to communicate with another? A. On an Ethernet Network, the MAC address (hardware address) is used for one host to communicate with another
8. The maximum distance of 1000Base-T is? A. 100Base-T and 1000Base-T both have a maximum distance of 100 meters, or 328 feet.
9. What device can you not use full-duplex communication with? A. Full-duplex communication cannot be used with a hub, because a hub is a half-duplex single communication device. A host, switch and router have the ability to process traffic (frames), whereas a hub is a multiport repeater.
10. What does the Base mean in 100Base‐TX? A. The 100 means 100Mbps. The Base means baseband, which means baseband technology—a signaling method for communication on the network
11. What is the decimal equivalent of this binary number: 11000000.10101000.00110000.11110000? A. 192.168.48.240
11000000 is 192, 10101000 is 168,
00110000 is 48, and 11110000 is 240.
12. What is the decimal number 10 in hexadecimal? A. 10 is A
13. What is the decimal value for the binary number 11101000? A. The 128, 64, 32, and 8 bits are on, so just add the values: 128 + 64 + 32 + 8 = 232.
14. What is the effective total throughput increase with a full-duplex connection? A. Double up! You can get 20Mbps with a 10Mbps Ethernet running full duplex or 200Mbps for Fast Ethernet
15. What is the maximum distance of 10GBase‐LR? A. A 10GBase‐LR implementation can go a distance of up to 6 miles
16. What is the maximum distance of 10GBase‐SR? A. A 10GBase‐SR cable can have a maximum distance of 990 feet (302 meters)
17. What is the purpose of the Frame Check Sequence (FCS) in an Ethernet frame? A. Error detection – The FCS can detect frames in the sequence by calculating the cyclic redundancy check (CRC), which verifies that all the bits in the frame are unchanged
18. What protocol helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium? A. Carrier Sense Multiple Access with Collision Detection (CSMA/CD) helps packets that are transmitted simultaneously from different hosts share bandwidth evenly
19. Which of the following can run full-duplex and achieve 200Mbps with CAT5e cable? A. 100Base-T uses CAT5e and can run
200Mbps when using full-duplex.
100Base-TX is only CAT-5, not CAT5e
20. Which technology increases the bandwidth for network transmission by joining together multiple connections in one logical connection? A. Bonding can increase bandwidth and provide redundancy for devices that have multiple links connected together