Foram encontradas 924 questões.
Qual a tensão necessária para que um aparelho telefônico analógico possa funcionar?
Provas
A sinalização de registro nas centrais telefônicas atuais pode ser mostrada por seus comandos de software. Isso é útil para acompanhar problemas de encaminhamento e congestionamento, pois, na sinalização ___________, cada sinal enviado obriga o registrador de destino a emitir um sinal de volta; caso contrário, a ligação é interrompida.
Assinale a alternativa que completa corretamente a lacuna do texto acima.
Provas
No que se refere à telefonia IP, considere os requisitos abaixo.
I - Transmissão de voz em tempo real com tempo de latência (atraso) menor que 100ms.
II - Definição de procedimentos de sinalização para o estabelecimento e controle de chamadas e para o fornecimento de serviços adicionais, como chamada em conferência, chamada em espera, identificação de chamadas, entre outros.
III - Provimento de interfaces com os sistemas públicos de telefonia comutada e móvel.
Quais são requisitos para telefonia IP?
Provas
Que protocolo da camada de sessão da telefonia IP define padrões para comunicação multimídia em redes que não oferecem qualidade de serviço (QoS) garantida?
Provas
Considerando os elementos que compõem a telefonia móvel, assinale com V (verdadeiro) ou F (falso) as afirmações abaixo.
( ) As ERBs (Estações Rádio Base) estabelecem a interface com a rede de comutação.
( ) Cada ERB é conectada a uma CCC (Central de Comutação e Controle) por fibra óptica ou rádio digital.
( ) Um TM (Terminal Móvel) contém uma unidade de controle, transceptores rádio, antenas, plantas de alimentação e terminais de dados.
( ) A CCC comuta chamadas originadas na estação móvel, permitindo que a estação móvel tenha à sua disposição os mesmos serviços e facilidades fornecidos pela rede pública aos assinantes fixos.
( ) Uma ERB transmite e recebe sinais de controle para o estabelecimento e supervisão das chamadas.
A sequência correta de preenchimento dos parênteses, de cima para baixo, é
Provas
Instrução: A questão refere-se ao texto abaixo.
Fiber Cable
Fiber optic technology uses light as an information carrier. The cable consists of a core, a single continuous strand of glass or plastic that is measured in microns (μ) by the size of its outer diameter. This is the pathway for light rays carrying data signals. Fiber is the preferred cable for applications that require high bandwidth, long distances, and immunity to electrical interference. It’s the most commonly installed backbone cable as well.
The advantages of fiber.
Greater bandwidth. Because fiber provides far greater bandwidth than copper and has proven performance at rates up to 10 Gbps, it gives network designers future-proofing capabilities. Fiber can carry more information with greater fidelity than copper.
Low attenuation and greater distance. Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at high speeds and greater distances. Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. (Fiber distances are usually measured in metric units.)
Immunity. Fiber provides extremely reliable data transmission. It’s completely immune to many environmental factors that affect copper cable, such as EMI/RFI, crosstalk, impedance, and more. You can run fiber cable next to industrial equipment without worry. It’s also less susceptible to temperature fluctuations than copper cable is.
Design. Fiber is lightweight, thin, and more durable than copper cable. Its small size makes it easier to handle, and it takes up less space in cabling ducts.
Costs. Installation costs for fiber are higher than copper because of the skill needed for termination. Overall, fiber is more expensive than copper in the short run, but it may actually be less expensive in the long run.
Adaptado de: https://www.blackbox.com/resource/gen- PDF/Buyers-Guides/Black_Box_Cabling_Guide.pdf
Quanto ao custo da fibra, o último parágrafo assegura que
Provas
Instrução: A questão refere-se ao texto abaixo.
Fiber Cable
Fiber optic technology uses light as an information carrier. The cable consists of a core, a single continuous strand of glass or plastic that is measured in microns (μ) by the size of its outer diameter. This is the pathway for light rays carrying data signals. Fiber is the preferred cable for applications that require high bandwidth, long distances, and immunity to electrical interference. It’s the most commonly installed backbone cable as well.
The advantages of fiber.
Greater bandwidth. Because fiber provides far greater bandwidth than copper and has proven performance at rates up to 10 Gbps, it gives network designers future-proofing capabilities. Fiber can carry more information with greater fidelity than copper.
Low attenuation and greater distance. Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at high speeds and greater distances. Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. (Fiber distances are usually measured in metric units.)
Immunity. Fiber provides extremely reliable data transmission. It’s completely immune to many environmental factors that affect copper cable, such as EMI/RFI, crosstalk, impedance, and more. You can run fiber cable next to industrial equipment without worry. It’s also less susceptible to temperature fluctuations than copper cable is.
Design. Fiber is lightweight, thin, and more durable than copper cable. Its small size makes it easier to handle, and it takes up less space in cabling ducts.
Costs. Installation costs for fiber are higher than copper because of the skill needed for termination. Overall, fiber is more expensive than copper in the short run, but it may actually be less expensive in the long run.
Adaptado de: https://www.blackbox.com/resource/gen- PDF/Buyers-Guides/Black_Box_Cabling_Guide.pdf
Os parágrafos informam que
Provas
Instrução: A questão refere-se ao texto abaixo.
Fiber Cable
Fiber optic technology uses light as an information carrier. The cable consists of a core, a single continuous strand of glass or plastic that is measured in microns (μ) by the size of its outer diameter. This is the pathway for light rays carrying data signals. Fiber is the preferred cable for applications that require high bandwidth, long distances, and immunity to electrical interference. It’s the most commonly installed backbone cable as well.
The advantages of fiber.
Greater bandwidth. Because fiber provides far greater bandwidth than copper and has proven performance at rates up to 10 Gbps, it gives network designers future-proofing capabilities. Fiber can carry more information with greater fidelity than copper.
Low attenuation and greater distance. Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at high speeds and greater distances. Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. (Fiber distances are usually measured in metric units.)
Immunity. Fiber provides extremely reliable data transmission. It’s completely immune to many environmental factors that affect copper cable, such as EMI/RFI, crosstalk, impedance, and more. You can run fiber cable next to industrial equipment without worry. It’s also less susceptible to temperature fluctuations than copper cable is.
Design. Fiber is lightweight, thin, and more durable than copper cable. Its small size makes it easier to handle, and it takes up less space in cabling ducts.
Costs. Installation costs for fiber are higher than copper because of the skill needed for termination. Overall, fiber is more expensive than copper in the short run, but it may actually be less expensive in the long run.
Adaptado de: https://www.blackbox.com/resource/gen- PDF/Buyers-Guides/Black_Box_Cabling_Guide.pdf
Com base no trecho, que explica que o sinal da fibra ótica é feito de luz, considere as vantagens enumeradas a seguir.
I - Percorre grandes distâncias a uma velocidade baixa.
II - Apresenta muito pouca perda de sinal durante a transmissão.
III - Tem maior ou menor alcance, dependendo da unidade métrica usada para a sua avaliação.
Quais estão corretas?
Provas
Instrução: A questão refere-se ao texto abaixo.
Fiber Cable
Fiber optic technology uses light as an information carrier. The cable consists of a core, a single continuous strand of glass or plastic that is measured in microns (μ) by the size of its outer diameter. This is the pathway for light rays carrying data signals. Fiber is the preferred cable for applications that require high bandwidth, long distances, and immunity to electrical interference. It’s the most commonly installed backbone cable as well.
The advantages of fiber.
Greater bandwidth. Because fiber provides far greater bandwidth than copper and has proven performance at rates up to 10 Gbps, it gives network designers future-proofing capabilities. Fiber can carry more information with greater fidelity than copper.
Low attenuation and greater distance. Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at high speeds and greater distances. Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. (Fiber distances are usually measured in metric units.)
Immunity. Fiber provides extremely reliable data transmission. It’s completely immune to many environmental factors that affect copper cable, such as EMI/RFI, crosstalk, impedance, and more. You can run fiber cable next to industrial equipment without worry. It’s also less susceptible to temperature fluctuations than copper cable is.
Design. Fiber is lightweight, thin, and more durable than copper cable. Its small size makes it easier to handle, and it takes up less space in cabling ducts.
Costs. Installation costs for fiber are higher than copper because of the skill needed for termination. Overall, fiber is more expensive than copper in the short run, but it may actually be less expensive in the long run.
Adaptado de: https://www.blackbox.com/resource/gen- PDF/Buyers-Guides/Black_Box_Cabling_Guide.pdf
Qual a melhor tradução para a palavra provides, no contexto em que se encontra?
Provas
Instrução: A questão refere-se ao texto abaixo.
Fiber Cable
Fiber optic technology uses light as an information carrier. The cable consists of a core, a single continuous strand of glass or plastic that is measured in microns (μ) by the size of its outer diameter. This is the pathway for light rays carrying data signals. Fiber is the preferred cable for applications that require high bandwidth, long distances, and immunity to electrical interference. It’s the most commonly installed backbone cable as well.
The advantages of fiber.
Greater bandwidth. Because fiber provides far greater bandwidth than copper and has proven performance at rates up to 10 Gbps, it gives network designers future-proofing capabilities. Fiber can carry more information with greater fidelity than copper.
Low attenuation and greater distance. Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at high speeds and greater distances. Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. (Fiber distances are usually measured in metric units.)
Immunity. Fiber provides extremely reliable data transmission. It’s completely immune to many environmental factors that affect copper cable, such as EMI/RFI, crosstalk, impedance, and more. You can run fiber cable next to industrial equipment without worry. It’s also less susceptible to temperature fluctuations than copper cable is.
Design. Fiber is lightweight, thin, and more durable than copper cable. Its small size makes it easier to handle, and it takes up less space in cabling ducts.
Costs. Installation costs for fiber are higher than copper because of the skill needed for termination. Overall, fiber is more expensive than copper in the short run, but it may actually be less expensive in the long run.
Adaptado de: https://www.blackbox.com/resource/gen- PDF/Buyers-Guides/Black_Box_Cabling_Guide.pdf
O primeiro parágrafo do texto se refere, especialmente,
Provas
Caderno Container