Questões de Concurso Comentadas para engenheiro de redes de comunicação

Foram encontradas 165 questões

Resolva questões gratuitamente!

Junte-se a mais de 4 milhões de concurseiros!

Q1878793 Redes de Computadores

Quanto a serviços IP, julgue o item subsecutivo.


O serviço SSH utiliza criptografias simétrica e assimétrica.

Alternativas
Q1878792 Redes de Computadores
Com relação ao endereçamento IP e ao roteamento, julgue o item subsequente. 


A demanda de um bloco de endereços com máscara de rede de 24 bites que necessite ser segmentado em pelo menos quatro sub-redes, capazes de comportar no mínimo 60 computadores cada uma, pode ser atendida utilizando-se uma máscara de 27 bites para cada sub-rede. 
Alternativas
Q1878790 Redes de Computadores
Com relação ao endereçamento IP e ao roteamento, julgue o item subsequente. 


Uma máscara de rede de 23 bites pode ser utilizada em uma rede na qual seja necessário colocar 500 computadores para se comunicar diretamente.
Alternativas
Q1878789 Redes de Computadores
Com relação ao endereçamento IP e ao roteamento, julgue o item subsequente. 


O protocolo OSPF (open shortest path first) é utilizado para roteamento dinâmico e possui suporte a enlaces ponto a ponto e redes de broadcast.
Alternativas
Q1878788 Redes de Computadores
Acerca do modelo de referência TCP/IP, julgue o item que se segue.

O protocolo IP opera na camada de transporte, que permite que hosts se comuniquem. 
Alternativas
Q1878787 Redes de Computadores
Acerca do modelo de referência TCP/IP, julgue o item que se segue.


O protocolo TCP tem capacidade de operar no controle da transmissão, que permite a entrega sem erros de um fluxo de bytes entre dois computadores. 
Alternativas
Q1878786 Redes de Computadores
Acerca do modelo de referência TCP/IP, julgue o item que se segue.


O protocolo ICMP (internet control message protocol) opera na camada de enlace.
Alternativas
Q1878785 Redes de Computadores
A respeito do modelo de referência OSI, julgue o item a seguir.

A transmissão de bites 0 e 1 por meios elétricos que se conectam a uma interface de rede opera na camada física. 
Alternativas
Q1878784 Redes de Computadores
A respeito do modelo de referência OSI, julgue o item a seguir.


A camada de enlace de dados consegue transformar dados recebidos, desde que esses estejam íntegros e sem erros, senão correções devem ser feitas pela camada de rede.
Alternativas
Q1877958 Direito Administrativo
Acerca das inovações da Lei nº 14.133/2021, julgue o próximo item. 


Ao contrário da Lei nº 8.666/1993, a nova lei estabelece que, de regra, a fase de habilitação é posterior à fase de julgamento das propostas.  
Alternativas
Q1877957 Direito Administrativo
Acerca das inovações da Lei nº 14.133/2021, julgue o próximo item. 


Visando reduzir a burocracia, a nova lei extinguiu algumas modalidades de licitação e não criou nenhuma nova modalidade. 
Alternativas
Q1877953 Direito Administrativo
Com base na Lei n.º 8.666/1993, julgue o item a seguir. 


É viável à administração alterar um contrato administrativo sem a anuência do contratado, desde que respeite o equilíbrio econômico-financeiro contratual. 
Alternativas
Q1877945 Direito Administrativo
Acerca das sanções aplicáveis em virtude da prática de atos de improbidade administrativa, julgue o item que se segue. 


Constitui ato de improbidade administrativa que atenta contra os princípios da administração pública revelar, antes da divulgação oficial, teor de medida econômica capaz de afetar o preço de mercadoria, bem ou serviço. 
Alternativas
Q1877944 Direito Administrativo
Acerca das sanções aplicáveis em virtude da prática de atos de improbidade administrativa, julgue o item que se segue. 


São considerados atos de improbidade administrativa as condutas dolosas e culposas tipificadas na Lei n.º 8.429/1992.
Alternativas
Q1877934 Legislação Federal
A respeito da Lei Geral das Telecomunicações, julgue o item a seguir. 


A Agência Nacional de Telecomunicações é autarquia especial subordinada ao Ministério das Comunicações, devendo atuar com imparcialidade, legalidade e impessoalidade. 
Alternativas
Q1877932 Inglês
   Early electronic computers such as Colossus made use of punched tape, a long strip of paper on which data was represented by a series of holes, a technology now obsolete. Electronic data storage, which is used in modern computers, dates from World War II, when a form of delay-line memory was developed to remove the clutter from radar signals, the first practical application of which was the mercury delay line. The first random-access digital storage device was the Williams tube, based on a standard cathode ray tube, but the information stored in it was volatile in that it had to be continuously refreshed, and thus was lost once power was removed. The earliest form of nonvolatile computer storage was the magnetic drum, invented in 1932 and used in the Ferranti Mark 1, the world’s first commercially available general-purpose electronic computer. 

Information Technology. Internet: <en.wikipedia.org> (adapted). 

Considering the text above, judge the following item. 



According to the text, punched tape is still used nowadays.  

Alternativas
Q1877931 Inglês
   Early electronic computers such as Colossus made use of punched tape, a long strip of paper on which data was represented by a series of holes, a technology now obsolete. Electronic data storage, which is used in modern computers, dates from World War II, when a form of delay-line memory was developed to remove the clutter from radar signals, the first practical application of which was the mercury delay line. The first random-access digital storage device was the Williams tube, based on a standard cathode ray tube, but the information stored in it was volatile in that it had to be continuously refreshed, and thus was lost once power was removed. The earliest form of nonvolatile computer storage was the magnetic drum, invented in 1932 and used in the Ferranti Mark 1, the world’s first commercially available general-purpose electronic computer. 

Information Technology. Internet: <en.wikipedia.org> (adapted). 

Considering the text above, judge the following item. 



According to the text, before 1932, information could only be stored provisionally in digital form. 

Alternativas
Q1877930 Inglês
   Early electronic computers such as Colossus made use of punched tape, a long strip of paper on which data was represented by a series of holes, a technology now obsolete. Electronic data storage, which is used in modern computers, dates from World War II, when a form of delay-line memory was developed to remove the clutter from radar signals, the first practical application of which was the mercury delay line. The first random-access digital storage device was the Williams tube, based on a standard cathode ray tube, but the information stored in it was volatile in that it had to be continuously refreshed, and thus was lost once power was removed. The earliest form of nonvolatile computer storage was the magnetic drum, invented in 1932 and used in the Ferranti Mark 1, the world’s first commercially available general-purpose electronic computer. 

Information Technology. Internet: <en.wikipedia.org> (adapted). 

Considering the text above, judge the following item. 



The verb “removed” (third sentence) can be adequately replaced with taken out. 

Alternativas
Q1877928 Inglês
   Jack Kilby’s revolutionary idea was to make all the different components of a circuit out of the same flat block of semiconductor material. Not only would this get rid of wires and faulty connections, it would make the entire circuit much more compact. Kilby demonstrated his first “integrated circuit” on Sept. 12, 1958.
   Six months later, in California, another engineer, Robert Noyce, independently came up with the idea of making an integrated circuit. Noyce’s chip was better suited to be manufactured in large numbers, and soon he was part of a young company called Intel.
   Thus was launched a revolution. The first chip-based computer was the first U.S. Air Force computer, built in 1961. The true potential of the integrated circuit was shown when Texas Instruments unveiled the pocket calculator. Previously calculators had been bulky devices that needed to be plugged in to electrical mains. The pocket calculator, small enough to hold in one’s palm, had a chip inside and batteries were adequate to power it.
   Progress was rapid thereafter. Many have already heard of Moore’s law, which has become a mantra of the digital age. First put forward by the Intel co-founder Gordon Moore in the 1960s, it says that the processing power of a chip doubles every two years, while the price falls by half. For more than four decades, Moore’s law has held, driving incredible growth and miniaturization — and wealth.
  The question is whether the semiconductor industry can sustain this pace. Further increasing the processing power of chips is proving to be problematic as certain fundamental physical barriers are being reached. At the same time, new frontiers are opening up. The quest is on to make chips that are powered by light instead of electricity, which will enable much faster computers.

Saswato Das. The Chip that Changed the World. Internet: <www.nytimes.com> (adapted).
Considering the text above, judge the following item. 


According to the text, before the pocket calculator, calculators were compact, but did not run on batteries. 
Alternativas
Q1877927 Inglês
   Jack Kilby’s revolutionary idea was to make all the different components of a circuit out of the same flat block of semiconductor material. Not only would this get rid of wires and faulty connections, it would make the entire circuit much more compact. Kilby demonstrated his first “integrated circuit” on Sept. 12, 1958.
   Six months later, in California, another engineer, Robert Noyce, independently came up with the idea of making an integrated circuit. Noyce’s chip was better suited to be manufactured in large numbers, and soon he was part of a young company called Intel.
   Thus was launched a revolution. The first chip-based computer was the first U.S. Air Force computer, built in 1961. The true potential of the integrated circuit was shown when Texas Instruments unveiled the pocket calculator. Previously calculators had been bulky devices that needed to be plugged in to electrical mains. The pocket calculator, small enough to hold in one’s palm, had a chip inside and batteries were adequate to power it.
   Progress was rapid thereafter. Many have already heard of Moore’s law, which has become a mantra of the digital age. First put forward by the Intel co-founder Gordon Moore in the 1960s, it says that the processing power of a chip doubles every two years, while the price falls by half. For more than four decades, Moore’s law has held, driving incredible growth and miniaturization — and wealth.
  The question is whether the semiconductor industry can sustain this pace. Further increasing the processing power of chips is proving to be problematic as certain fundamental physical barriers are being reached. At the same time, new frontiers are opening up. The quest is on to make chips that are powered by light instead of electricity, which will enable much faster computers.

Saswato Das. The Chip that Changed the World. Internet: <www.nytimes.com> (adapted).

Considering the text above, judge the following item. 



In the third sentence of the fourth paragraph, the pronoun “it” refers to Intel. 

Alternativas
Respostas
61: C
62: E
63: C
64: C
65: E
66: C
67: E
68: C
69: E
70: C
71: E
72: C
73: C
74: E
75: E
76: E
77: C
78: C
79: E
80: E