Chapter 1 Test Questions - ICT Introductory Concepts
T-1 leased lines run at a speed of about ________.
1.5 Mbps.
Switches are Layer ___ devices.
2.
The Data Link Layer is layer number ___.
2.
T-3 carrier circuits offer speeds of about __________.
4300 kbps.
Hosts are Layer ____ devices.
5.
How many layers of the TCP/IP-OSI architecture are needed to get a message from a sending host to a receiving host?
5.
What is a noise spike?
A large, brief increase in the noise energy.
Sound, temperature, & time are all examples of ______ data.
Analog.
As signals propagate, they become weaker due to ___________.
Attenuation.
_______ Network Layers are needed to carry a message across the Internet.
Between.
Telecommunications is measured in ____ per second and in multiples of ____.
Bits, 1000.
A network where all hosts are attached to one common media that allows communications among the hosts is known as a ___ typology.
Bus.
T-1, T-3, and DSL are all examples of _______ ________.
Carrier circuits.
The worldwide phone system is based on _______ switching, where an electrical circuit is created each time data are sent.
Circuit switching.
In optical fiber, light travels through the ____.
Core.
_________ is a special case of EMI in which conductors in a cable interfere with each other.
Crosstalk.
The purpose of ____ is to assign an IP address and other identifiers to a host.
DHCP.
Routers make packet forwarding decisions based on a packet's ___________ __ _______.
Destination IP Address.
When one pair in a UTP cord interferes with signals in other pairs, this is ___ & _________.
EMI, crosstalk.
Bits are commonly grouped into sets of _____ bytes, called ______.
Eight, octets.
The process of putting a message inside of another message so it can be transmitted is called _____________.
Encapsulation.
The ___ mandates that electronic equipment may not emanate more than a specified level of radio interference.
FCC.
_____ _____ is a WAN technology used to interconnect LANs.
Frame relay.
___________ allows communication simultaneously between two hosts.
Full-duplex.
A ____ is any Layer 5 telecommunication device capable of propagating data.
Host.
42.18.248 is an __ address.
IP.
Does IP or TCP operate at the Internet layer?
IP.
By following standards and protocols when manufacturing hardware, vendors ensure ________________ of their products.
Interoperability.
In the worldwide phone system, the media between the customer premises and the local switch is called the _____ ____, while a carrier circuit that interconnects switches is called a _____ ____.
Local loop, trunk line.
A ____ network typology is one that uses a series of interconnecting routers that creates multiple pathways between points on a network.
Mesh.
Routers are usually connected in a ____ typology.
Mesh.
A _____ connection is a point-to-point topology that allows two hosts or devices to communicate through a circuit that interconnects devices.
Modem.
What is the process by which digital data are converted to sound?
Modulation.
A modem is an example of a _________.
Modulator.
The process of converting human-friendly names into numeric addresses is known as ____ __________.
Name resolution.
_______ ________ is the physical arrangement of a network's computers, switches, routers, and transmission links.
Network typology.
Does UDP perform error correction?
No.
Is TCP connectionless?
No.
Is UDP reliable?
No.
The ___ portion of the hybrid architecture involves Layers 1 & 2, while the ______ portion deals with Layers 3 through 5.
OSI, TCP/IP.
The ___ protocol provides an encrypted connection to a remote computer that typically allows login and commands to be executed on the remote computer.
SSH.
A signal transmitted one bit at a time is known as ______ communication.
Serial.
Because of greater distances, WAN transmission speeds are ______ than LAN transmission speeds.
Slower.
A ______ specifies a particular application on a particular host.
Socket.
IP_ADDRESS:PORT_NUMBER represents a ______.
Socket.
The ____ network typology is the most common LAN typology in which hosts are interconnected through a series of hubs and switches.
Star.
A ____ ____ can be used to synchronize a receiver to an incoming data stream.
Sync word.
Who creates Internet infrastructure standards?
The IETF.
Which layer is responsible for between-network routing?
The Internet Layer.
Which layer is responsible for signaling?
The Physical Layer.
Which layer in the TCP/IP-OSI hybrid architecture governs end-to-end transmission between two hosts across an internet?
The Transport Layer.
Today, the main benefit of optical fiber compared to UTP is ______________________.
The ability to span greater distances.
In LANs, optical fiber is typically used in _____ _____.
Trunk lines.
In an internet, different individual networks are connected by _____ lines, _______ switches, & _______.
Trunk, carrier, routers.
What is the dominant scheme for encoding data by a computer?
Unicode.
Does UDP perform error-checking?
Yes.
Is IP connectionless?
Yes.
Is TCP reliable?
Yes.
