Chapter 9
Broadband cable
384Kbps - 400Mbps
What is the Internet connection speed of the broadband cable?
384Kbps - 400Mbps
What does the acronym AP denote?
Access Point
Even with cheap high performance switches, why are VLANs so popular?
Apart from hardware savings, they reduce the labor cost of network configuration and rearrangement.
Which technology carries data as a secondary signal on analog phone lines?
DSL
What does the acronym DNS denote?
Domain Name System
What connection technologies are most common for modern LANs?
Ethernet for wired connections, and Wi-Fi for wireless networks.
Dialup
Less than 56Kbps
The Application layer enables applications on a network node to request network services such as file transfers, email, and database access
True
Bridge
A device that prevents collisions by ensuring not to send the data to a segment that is already busy
Which of the following is a website that measures the bandwidth and latency of the Internet connection?
Speed test site
Which two details can you use to access a router's configuration page through a Web browser?
The router's IP address and the router name
Fiber-optic
Up to 1Gbps
Which technology allows voice data to be transmitted over a company's network?
Voice over IP (VoIP)
Router
A device that can read packets on the Internet layer to view their IP addresses and can communicate with others to find the best path through the network to any given host or subnet
Gateway
A device that enables the traffic to flow in and out of the network
Translating bridge
A device which join segments using different link layer protocols, by translating frames from one format into the other, such as from Ethernet to Token Ring or Wi-Fi.
Hub
A simple network device that connects multiple nodes in a star configuration
Logical network
A virtual representation of a network that appears to the user as an entirely separate and self-contained network even though it might physically be only a portion of a larger network or a local area network.
What is scalability?
Ability of a network to grow to meet new demands
Which of the following is a channel access method used by various radio communication technologies?
CDMA
What does the acronym DSL denote?
Digital Subscriber Line
Which networking device lets you connect multiple nodes in a star configuration?
Hub
What networks still make frequent use of hubs and wired repeaters?
Hubs might still be found on legacy Ethernet networks that aren't fully switched. Repeaters are usually found in CAN and WAN applications, where transmissions distances might be too great for a signal to carry clearly.
What does the acronym ISP denote?
Internet Service Provider
Which is a network device that provides an interface for connecting the computer to a network?
NIC
A PC with its connected Bluetooth devices, is an example of which of the following?
PAN
Which TCP/IP layers have the widest variety of available protocols?
The Application and Network Interface layers. The Transport and Internet layers rely on a smaller number of core protocols.
Your fiber provider is moving from FTTN to FTTP. What does that mean for you as a customer?
The ONT itself will be moved from a cabinet somewhere in the neighborhood to somewhere on your premises. You probably won't need any new equipment, but it might result in faster network speeds.
Scalability
The ability of a network to grow to meet new demands
Availability
The ability of a network to maintain connectivity, as consistently as possible, while avoiding outages
Quality of Service (QoS)
The ability of a network to provide better service and connection quality to special kinds of network traffic
Performance
The ability of a network to rapidly convey traffic
A bridge is a type of computer network device that provides interconnection with other networks that use the same protocol.
True
Metropolitan Area Network (MAN)
Used to connect all or part of a city
Storage area network (SAN)
Used to connect computers to storage devices using network technology
Campus Area Network (CAN)
Used to connect multiple buildings in a single campus
What kind of PANs have you worked with?
a PC with its Bluetooth devices are a common example.
Other than physical distance, what distinguishes a WAN from a LAN?
a WAN requires transmission technologies compatible with long distances, and usually involves leased lines owned by a third party.
Which hardware device can connect similar networks and can separate the network traffic on each segment?
bridge
Which device is the combination of a bridge and a router?
brouter
How many network cards are required in each computer when internet access is shared via a router?
one network card in each computer
Which type of wireless network interference is caused by competing wireless signals?
radio frequency interference (RFI)
Which hardware device routes data from a local area network (LAN) to a phone line or other network connection?
router
Which devices are used to connect workstations in a 100-BaseT network?
routers, switches, and hubs
Which internet connection has a line-of-sight requirement?
satellite
What kinds of security hardware are in use in your organization's network?
the least there will be firewalls.
To which port on the router or switch should you connect a computer to access the internet?
to the local area network (LAN) port
Which device is used to extend the range of an existing wireless network?
wireless repeaters
What is the maximum speed limit supported by a T1 line?
1.544 Megabits per second (Mbps)
DSL
128Kbps - 100Mbps
What is the difference between Ethernet over Power and Power over Ethernet?
Ethernet over Power lets you use power lines for networking where you don't have existing network cables, while Power over Ethernet lets you use network cables to carry electrical power to remote network devices.
What is the purpose of Power over Ethernet (PoE)?
It allows an Ethernet connection to be used as both a network and power connection.
A cable modem is a peripheral device used to connect to the Internet.
True
You want to replace the network firewall, IDS, and content filter with a single device which will provide comprehensive network security protection. What sort of product should you look for?
UTM
How do abstraction layers improve network compatibility?
You can change the implementation of a given layer, such as the network interface, without affecting protocols on other layers.
Which hardware device operates at the Physical layer (Layer 1) of the Open Systems interconnection (OSI) model to provide connectivity to network computers?
a hub
What device must be installed in a computer to connect the computer to other computers or a network?
a network adapter
Which hardware device operates at the Data link layer of the Open Systems Interconnection (OSI) model to provide connectivity to network computers?
a switch
Which type of wireless network interference is caused by electrical devices, such as fluorescent lights?
electromagnetic interference (EMI)
ISDN
64Kbps - 128Kbps
Digital Subscriber Line (DSL)
A family of related technologies which carry data as a separate, high-frequency signal over the same physical cables of a voice telephone or ISDN line, without interfering with the telephone service.
From top to bottom, what are the layers of the TCP/IP model?
Application, Transport, Internet, Network Interface.
Which is a technology for bringing high-bandwidth information to homes and small businesses over ordinary telephone lines?
DSL
Other than speed, what are the differences between Dialup, ISDN, and DSL equipment and functions?
Dialup requires an analog modem and can work over any analog telephone line. ISDN uses one or more channels of a digital phone line, so requires a specialized digital terminal and associated line. Both can be used to connect to the Internet, or to dial another user of the same service. DSL uses a high-frequency carrier signal over the same wire as an analog or digital line; it needs both a DSL modem, and a location physically close to a telephone exchange. It's usually an Internet connection only.
Which technology supports data rates up to 84Mbps downstream and 22Mbps upstream using MIMO transmission?
HSPA+
Repeater
It allows a network cabling system to extend beyond its maximum allowed length and reduces distortion by amplifying or regenerating network signals.
How do the OSI model layers correspond to the TCP/IP model layers
Layers 1-2 correspond to Network Interface, Layer 3 to Internet, Layer 4 to Transport, and Layers 5-7 to Application.
Which network type is used to connect all or part of a city?
MAN
Which of the following is used to monitor and analyze network traffic to protect a system from network-based threats?
NIDS
Which type of network covers only a very small area, of centimeters to a few meters across?
PAN
the network scopes from smallest to largest
PAN LAN MAN WAN
As a third alternative, how would satellite Internet suit your network usage, provided it offered comparable download speeds?
Some users might see little change, but higher latency could be a problem for games or real-time applications, and limited upload speeds could be a serious limitation for uploading files or hosting services.
Your new rural home is in a location without high-speed wired Internet access, but there are 4G and fixed wireless services available. What would be the difference between installing the two?
The 4G service would use a base station that you can move freely around like any other mobile device, while the fixed service would need a stationary antenna, possibly with a clear line of sight to the ISP's tower.
You're given a choice between combined telephone and Internet service from three providers: One DSL, one cable, and one fiber. What else can you guess about the three options?
The DSL provider is a telephone company offering analog telephone service, while the others are likely VoIP phones. Fiber is likely fastest followed by cable, but it depends entirely on the location and individual providers. The cable and fiber providers are also most likely to have television offerings. Despite the name, it's likely that the fiber service's connection into the building will still be a twisted-pair or coaxial cable.
Compatibility
The ability of a network's components to communicate successfully both physically and logically
What are the advantages and disadvantages of adding a wireless repeater to your Wi-fi network?
The advantage is that you can extend your coverage area without needing additional connections to the wired network. The disadvantage is that due to the nature of Wi-Fi it effectively halves your overall wireless bandwidth.
What are the benefits and drawbacks of peer-to-peer networking
The main benefit is lower initial expense due to less need for specialized hardware and technical knowledge. The drawbacks include increased maintenance, and reduced scalability and security.
What are the benefits and drawbacks of client-server networking?
The main benefits are increased central control, allowing more secure and scalable networks. The main drawback is that dedicated servers can be expensive and require more advanced technical knowledge to install and operate.
How are dial-up modems like broadband modems? How are they different?
They are alike since connect a computer or LAN to a WAN, and both modulate and demodulate digital signals into analog carrier waves. They are different since dial-up modems connect one place to another over analog telephone lines while broadband modems link into an ISP's cable or DSL network.
Identify the network interface controllers on computers and devices in the room
They will include Ethernet and Wi-Fi adapters as well as corresponding equipment on other hosts and devices.
Which of the following describes the amount of traffic that can be passed through the network in a given time?
Throughput
Given you had the right hardware to connect to your other devices, what limitations would your cellular service have as a primary home Internet connection?
likely possibilities include speed, signal strength at home, and data limits.
