Question: The physical layer (layer 1) specifies details about the underlying transmission medium and the associated hardware. All specifications related to electrical properties, radio frequencies, and
The physical layer (layer 1) specifies details about the underlying transmission medium and the associated hardware. All specifications related to electrical properties, radio frequencies, and signals belong in layer 1.
The simplest LAN extension mechanism consists of an optical fiber and a pair of fiber modems used to connect the computer to a remote Ethernet.
The simplest form of wiring that helps reduce interference from electrical noise is known as;
| | plastic coated, insulating straight wire |
| | unshielded twisted pair (UTP) |
The term "header" in Internet communications refers to;
| | an outstanding play performed solely by use of the head |
| | the message, or content of the packet |
| | additional information added by a protocol |
| | the first line of an RSS feed |
The term communication protocol, network protocol, or protocol refers to;
| | A research experience on ARPANET |
| | Diplomatic terminology only |
| | The details for one aspect of computer communication, including actions to be taken when errors or unexpected situations arise |
| | Multiple entities, such as committees within IEEE, that must agree on details ranging from the electrical voltage used to the format and meaning of messages, to ensure that entities can interoperate correctly |
The terms "guided" and "unguided" distinguish between;
| | physical media and radio transmissions |
| | copper wiring and transmissions in free space |
| | optical fibers and radio transmissions |
The typical LAN is designed to span;
| | only a few hundred meters |
To master the complexity in networking, it is important to gain a broad background that includes five key aspects of networking. These five key aspects are;
| | Network applications, data communications, packet switching, internetworking with TCP/IP, additional networking concepts and technologies. |
| | Network applications, federal regulations, hardware and software systems, network programming, and software development. |
| | Federal regulations, high-speed Internet access, big data storage, wireless technologies and token ring technologies. |
| | LAN, WAN, MAN, TCP/IP, software development and Internet programming. |
The IEEE addressing scheme supports three types of addresses that correspond to three types of packet delivery. These types are unicast, broadcast, and multicast. Identify the correct definition for the type listed below.
Unicast:
| | Identifies a subset of the computers on a given network, and specifies that each computer in the subset should receive a copy of the packet. |
| | Corresponds to all computers, and specifies that each computer on the network should receive a copy of the packet. |
| | Uniquely identifies a single computer, and specifies that only the identified computer should receive a copy of the packet. |
What is a "topology?"
| | A term used to specify the format of a packet |
| | the basic shape used to identify/characterize a LAN |
| | a map used in mountainous terrain |
| | a technology classified as LAN, WAN or MAN |
What is data communications?
| | The study of low-level mechanisms and technologies used to send information across the physical communication medium, such as a wire, radio wave, or light beam. |
| | A way to use physical phenomenon to transfer information. |
| | The study of physical communication properties that provides a foundation of concepts of which the rest of networking is built. |
What is packet switching, and why is packet switching relevant to the Internet?
| | Packet switching divides data into small blocks, called packets, which can be sent quickly over the Internet. |
| | Packet switching is a theory that relies on a dedicated circuit, providing access to only a single computer on the World Wide Web. |
| | Packet switching builds on the same fundamental data communications mechanisms as the phone system, but uses the underlying mechanisms in a new way. |
Which of the following are layers within the TCP/IP stack?
| | Physical, electrical, mechanical |
| | application, physical, software |
| | transport, Internet, network interface |
| | ablative, dative, derivative |
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