Computers in Accounting Test - 20

GEO orbit has the highest altitude.

A geostationary equatorial orbit (GEO) is a circular geosynchronous orbit in the plane of the Earth's equator with a radius of approximately 42,164 km (26,199 mi) (measured from the center of the Earth). A satellite in such an orbit is at an altitude of approximately 35,786 km (22,236 mi) above mean sea level. A high Earth orbit is a geocentric orbit with an altitude entirely above that of a geosynchronous orbit (35,786 kilometres (22,236 mi)).

While the geostationary orbit lies on the same plane as the equator, the geosynchronous satellites has a different inclination. This is the key difference between the two types of orbits.

Orbital competition. According to Satellite Signals, there are 402 satellites in geosynchronous orbit. At geosynchronous orbit, the “ring” around Earth can accommodate a number of satellites — 1,800 altogether, according to one analysis by Lawrence Roberts, published in the Berkeley Technology Law Review.

A resolver is the DNS client.

A hosts:nisplus dns line in a switch file indicates the use of NIS+ for local host information and DNS for remote information. A client-only DNS client does not run in.named . Instead, the client consults the resolver. The resolver knows about a list of name servers for the domain, to which queries are then directed.

DNS Client is a client machine configured to send name resolution queries to a DNS server.Domain Name Resolvers, also called DNS resolvers, are the computers which are used by ISPs to respond to a user request to resolve a domain name. "Resolving a domain name" refers to the translation of a domain name into an IP Address.

DNS stands for Domain Name System. The main function of DNS is to translate domain names into IP Addresses, which computers can understand. The UTM-1 appliance includes an internal DNS server, which can resolve DNS names for hosts defined as network objects. ... Note: The internal DNS server responds to DNS requests from internal network hosts only. It does not respond to requests from the Internet.

TSI and TDM bus is a time division switch.

The incoming and outgoing signals when received and re-transmitted in a different time slot, is called Time Division Switching. ... Time division switches use time division multiplexing, in switching. The two popular methods of TDM are TSI (Time and Slot Interchange) and TDM bus.

time division switch An all-electronic switching system based on time division multiplexing (TDM) principles: an input digitized signal from a source is connected to an output trunk by assigning a group of bits from the input data stream to a time slot in a high-speed TDM output data stream.

Time slot interchange (TSI) is the most popular technology in a time division switch. It uses the random access memory with several locations. The RAM fills up with the incoming data from time slots in the order received. Slots are then sent out in an order based on the decisions of a control unit.

First three digits of the DNIC (Data Network Identification Code) identify the country

The DNIC has three digits to identify the country (one to identify a zone and two to identify the country within the zone) and one to identify the PDN (allowing only ten in each country). data network identification code (DNIC): In the CCITT International X.121 format, the first four digits of the international data number, the three digits that may represent the data country code, and the 1-digit network code, i.e. , the network digit.

data network identification code (DNIC): In the CCITT International X.121 format, the first four digits of the international data number, the three digits that may represent the data country code, and the 1-digit network code, i.e. , the network digit.

P is true, P and Q are true and K or not (K) is true implies K is true is not an assertion.

An assertion is a declaration that's made emphatically, especially as part of an argument or as if it's to be understood as a statement of fact. To assert is to state with force. So if someone makes an assertion, they're not just trying out an idea — they really mean it.

An example of someone making an assertion is a person who stands up boldly in a meeting with a point in opposition to the presenter, despite having valid evidence to support his statement.

When someone makes a statement investing his strong belief in it, as if it is true, though it may not be, he is making an assertion. Assertion is a stylistic approach or technique involving a strong declaration, a forceful or confident and positive statement regarding a belief or a fact.

Telephone line is a voice band channel.

A telephone line or telephone circuit (or just line or circuit within the industry) is a single-user circuit on a telephone communication system. This is the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network, and usually also implies a single telephone number for billing purposes reserved for that user. Telephone lines are used to deliver landline telephone service and Digital subscriber line (DSL) phone cable service to the premises. Telephone overhead lines are connected to the public switched telephone network.

A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is being used for the transmission of speech. In telephony, the usable voice frequency band ranges from approximately 300 Hz to 3400 Hz.

In a software engg. approach, the design phase is Top down,

A top-down approach (also known as stepwise design) is essentially the breaking down of a system to gain insight into the sub-systems that make it up. In a top-down approach an overview of the system is formulated, specifying but not detailing any first-level subsystems.

Top-down and bottom-up design. ... Top down approach starts with the big picture. It breaks down from there into smaller segments. A bottom-up approach is the piecing together of systems to give rise to more complex systems, thus making the original systems sub-systems of the emergent system.

Top-down design is one way of doing this. It breaks the program in to bite-sized chunks and allows you to solve each problem one at a time, in any order. ... The first assignment in Karel is relatively simple and top-down design with stepwise refinement and decomposition still finds a use here.

Design Model. The design model is an object model describing the realization of use cases, and serves as an abstraction of the implementation model and its source code. The design model is used as essential input to activities in implementation and test. UML representation: Model, stereotyped as «design model».