SóProvas

ID
1191382
Banca
FUNRIO
Órgão
IF-PI
Ano
2014
Provas
Disciplina
Redes de Computadores
Assuntos

Com relação ao cabeamento estruturado e as características de fibras ópticas são apresentadas as seguintes afirmativas:

I - Nas fibras óticas monomodo e multimodo o feixe ótico se dispersa igualmente em múltiplos feixes que possuem diferentes tempos de propagação.
II - A norma ANSI/TIA-568-C estabelece 200m como o comprimento máximo para fibras óticas multimodo 62.5/125 µm em redes Ethernet 1000Base-SX.
III - Segundo a norma ANSI/TIA-568-C, um sistema de cabeamento deve ser estruturado em seis subsistemas, que possuem, cada um, especificações de características dos componentes e condições de montagem e instalação.

Está correto apenas o que se afirma em

Alternativas
Comentários

  • Com a fibra 62,5/125, o máximo é de 275 m para SX e 550 m para LX.

  • Structured cabling consists of six subsystems:

       Entrance facilities is the point where the telephone company network ends and connects with the on-premises wiring belonging to the customer.

       Equipment rooms house equipment and wiring consolidation points that serve the users inside the building or campus.

       Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities, equipment rooms and telecommunications closets. Backbone cabling consists of the transmission media, main and intermediate cross-connects and terminations at these locations. This system is mostly used in data centers.

       Horizontal cabling wiring can be standard inside wiring (IW) or plenum cabling and connects telecommunications rooms to individual outlets or work areas on the floor, usually through the wireways, conduits or ceiling spaces of each floor. A horizontal cross-connect is where the horizontal cabling connects to a patch panel or punch up block, which is connected by backbone cabling to the main distribution facility.

       Telecommunications rooms or telecommunications enclosure connects between the backbone cabling and horizontal cabling.

       Work-area components connect end-user equipment to outlets of the horizontal cabling system.

    https://en.wikipedia.org/wiki/Structured_cabling