Troubleshooting Connectivity & Performance Issues

By default, which channels in a 2.4 GHz wireless network do not overlap?

1 and 11

Rank the following obstructions (from lowest to highest) according to the amount of attenuation they can cause for wireless communications. Brick wall Glass windows Wooden door Concrete wall Cinderblock Drywall

1. Glass windows 2. Dry wall 3. Wooden door 4. Cinderblock 5. Brick wall 6. Concrete wall

Rank the following wireless security configurations from least secure to most secure. WPA2 + TKIP/AES WEP WPA2 + AES WPA + TKIP Open

1. Open 2. WEP 3. WPA + TKIP 4. WAP2 + TKIP/AES 5. WAP2 + AES

How many characters are used for the passphrase when you have configured WPA/WPA2 for your wireless security?

Any value between 8 and 63

Which mitigation methods can be implemented to reduce the effects of network crosstalk?

Avoid sources of power when running cables and use shielded cables

A flashing amber light on a network adapter might be indicative of which networking problem?

Collisions

Which type of cable should be used to make a network connection from one computer directly to another computer?

Crossover

A wireless signal having to move around a large object such as a hill or a building is known as which type of interference?

Diffraction

Auto negotiation can automatically configure which settings on a network adapter?

Duplex mode and speed

A bottleneck is analogous to which situation?

Highway traffic being reduced from 2 lanes to 1

Why mught you choose to implement a wireless network using the 5 GHz band as opposed to the 2.4 GHz band?

It's generally less congested

Scrambled or garbled communications when using VoIP or video conferencing applications is an indication of which type of network issue?

Jitter

Which symptoms might be indicative of an intermittent short in a network environment?

Periodic connectivity loss and broadcast storms

Which steps should generally be taken first when troubleshooting a suspected damaged cable?

Replace the cable with a known good cable

The measure of how much interference is present on a wireless network compared to the quality of the signal is known as what?

Signal-to-noise ratio

A hidden node normally occurs under which circumstances?

When nodes are close enough to the access point, but too far away from each other