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- Question
How does a host on an Ethernet LAN know when to transmit after a collision has occurred?
- In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
- In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
- You can improve the CSMA/CD network by adding more hubs.
- After a collision, the station that detected the collision has first priority to resend the lost data.
- After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.
Options- A. 1 and 3
- B. 2 and 4
- C. 1,3 and 4
- D. 2 and 5
- Correct Answer
- 2 and 5
ExplanationOnce transmitting stations on an Ethernet segment hear a collision, they send an extended jam signal to ensure that all stations recognize the collision. After the jamming is complete, each sender waits a predetermined amount of time, plus a random time. After both timers expire, they are free to transmit, but they must make sure the media is clear before transmitting and that they all have equal priority. - 1. How many non-overlapping channels are available with 802.11g?
Options- A. 3
- B. 12
- C. 23
- D. 40 Discuss
- 2. You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?
Options- A. Issue the show ip arp command on the router connected to the switch.
- B. Issue the show ip route command on the router connected to the switch.
- C. Issue the show cdp neighbor command on the router connected to the switch.
- D. Issue the show cdp neighbors detail command on the router connected to the switch. Discuss
- 3. What is the frequency range of the IEEE 802.11a standard?
Options- A. 2.4Gbps
- B. 5Gbps
- C. 2.4GHz
- D. 5GHz Discuss
- 4. How many non-overlapping channels are available with 802.11b?
Options- A. 3
- B. 12
- C. 23
- D. 40 Discuss
- 5. What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?
Options- A. 14
- B. 15
- C. 16
- D. 30 Discuss
- 6. What are two purposes for segmentation with a bridge?
- To add more broadcast domains.
- To create more collision domains.
- To add more bandwidth for users.
- To allow more broadcasts for users.
Options- A. 1 only
- B. 2 and 3
- C. 2 and 4
- D. 4 only Discuss
- 7. Why does the data communication industry use the layered OSI reference model?
- It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
- It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
- It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.
- It encourages industry standardization by defining what functions occur at each layer of the model.
Options- A. 1 only
- B. 1 and 4
- C. 2 and 3
- D. 3 only Discuss
- 8. Which of the following allows a router to respond to an ARP request that is intended for a remote host?
Options- A. Gateway DP
- B. Reverse ARP (RARP)
- C. Proxy ARP
- D. Inverse ARP (IARP) Discuss
- 9. Which of the following statements are true regarding the command ip route 172.16.4.0 255.255.255.0 192.168.4.2?
- The command is used to establish a static route.
- The default administrative distance is used.
- The command is used to configure the default route.
- The subnet mask for the source address is 255.255.255.0.
Options- A. 1 and 2
- B. 2 and 4
- C. 3 and 4
- D. All of the above Discuss
- 10. What should the configuration register value be after you successfully complete the password recovery procedure and return the router to normal operation?
Options- A. 0x2100
- B. 0x2101
- C. 0x2102
- D. 0x2142 Discuss
More questions
Correct Answer: 3
Explanation:
The IEEE 802.11g standard provides 3 non-overlapping channels.
Correct Answer: Issue the show cdp neighbors detail command on the router connected to the switch.
Explanation:
Although option A is certainly the "best" answer, unfortunately option D will work just fine and your boss would probably prefer you to use the
show cdp neighbors detail command.
Correct Answer: 5GHz
Explanation:
The IEEE 802.11a standard runs in the 5GHz RF range.
Correct Answer: 3
Explanation:
The IEEE 802.11b standard provides 3 non-overlapping channels.
Correct Answer: 30
Explanation:
A /27 (255.255.255.224) is 3 bits on and 5 bits off. This provides 8 subnets, each with 30 hosts. Does it matter if this mask is used with a Class A, B, or C network address? Not at all. The number of host bits would never change.
Correct Answer: 2 and 3
Explanation:
Bridges break up collision domains, which allow more bandwidth for users.
Correct Answer: 1 and 4
Explanation:
The main advantage of a layered model is that it can allow application developers to change aspects of a program in just one layer of the layer model's specifications.
Advantages of using the OSI layered model include, but are not limited to, the following:
It divides the network communication process into smaller and simpler components, thus aiding compo- nent development, design, and troubleshooting;
it allows multiple-vendor development through standardization of network components;
it encourages industry standardization by defining what functions occur at each layer of the model;
it allows various types of network hardware and software to communicate;
Correct Answer: Proxy ARP
Explanation:
Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.
Correct Answer: 1 and 2
Explanation:
Although answer D almost seems right, it is not; the mask is the mask used on the remote network, not the source network. Since there is no number at the end of the static route, it is using the default administrative distance of 1.
Correct Answer: 0x2102
Explanation:
All Cisco routers have a default configuration register setting of
0x2102, which tells the router to load the IOS from flash memory and the configuration from NVRAM.
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