Chapter 4 Networks
What is the maximum frequency at Cat 5 cable?
100 MHz
Which is a faster networking cable?
10GBaseT - The fastest Ethernet networking cable, capable of transmitting at 10 Gbps (gigabits per second)
How many standard voice lines are equivalent to a T1 line?
24
What is the speed range of DSL?
256 Kbps to 1.5 Mbps
What frequency range are voice-grade telephone lines designed to carry?
300 to 3300 Hz
Which of the following standards is used in wireless networking?
802.11
How does WLAN differ from LAN?
A WLAN is a LAN that uses wireless transmission instead of guided media.
What is the difference between a hub and a switch?
A switch can examine an input port's packet header and switch a point-to-point connection to the output port addressed by the packet
What is the difference between AM and FM?
AM places information on a carrier by modulating the amplitude. FM places information by modulating the carriers frequency.
What are the four ways to rate transmission media?
Bandwidth, signal-to-noise ratio, bit error rate, and attenuation
What are the three LAN topologies?
Bus, star, and ring
Fiber-optic cable is made of:
Cable consisting of thin strands of nearly pure glass surrounded by a reflective material and a touch outer coating (or plastic sheath) Short answer- (Glass)
What are the two basic copper wire formats?
Coaxial and twisted pair
Which type of multiplexing combines signals on a circuit by dividing available transmission bandwidth into narrower bands?
FDM
DSL is a a combination of what two types of multiplexing?
FDM and TDM
A hub has a single input and a single output. True or False?
False, it has multiple
Which type of guided medium is the least susceptible to attenuation and inductance?
Fiber-optic cable
Which network device is designed to prevent damage to an inside network from an outside source?
Firewall
Which network device can interpret and translate different network protocols?
Gateway
What are the two general types of transmission media?
Guided and unguided
Which is a better signal to noise ratio?
High ratios are better than low rations because a high ratio indicates that the signal is stronger than the noise
What is a NIC?
Network interface card
Which of the OSI layers is involved with a network's electrical specifications?
Physical
How many layers are in the OSI model?
Seven
What are examples of networking protocols?
TCP/IP, FTP, HTTP
Which of the three LAN topologies has emerged as the most popular?
The bus topology has been the most popular in the past, but the advent of home networking has made the star topology increasingly popular
What is bandwidth?
The speed a transmission medium is capable of handling, measured in bits per second
Which of the OSI layers is responsible for guaranteed delivery of data?
Transport
Modems convert binary digits into sounds by modulating tones. True or False?
True
What is WAN?
Wide area network
Which of the following is not one of the OSI model layers?
Wireless