Questão 4945

• Banca: CESGRANRIO
• Órgão: TCE-RO
• Ano: 2007
• Provas: CESGRANRIO - 2007 - TCE-RO - Analista de Sistemas
• Disciplina: Redes de Computadores
• Assuntos: Arquiteturas de Rede; ATM (Asynchronous Transfer Mode)

Nas redes ATM, qual protocolo da camada de adaptação é destinado a tráfego com taxa de transferência constante (CBR - Constant Bit Rate) e orientado à conexão?

• A. AAL 3/4
• B. AAL 1
• C. AAL 2
• D. AAL 5
• E. STM

Gabarito: B

Comentários

• AAL1 -> Constant bit rate
  AAL2 -> Variable bit rate
  AAL3/4 -> A mixture of AAL1 and AAL2, implements the Available bit rate
  AAL5 -> An improvement over AAL3/4, it's the most used AAL nowadays.
• AAL1 -> Constant bit rate
  
  tranquilo, tranquilo, tranquilo

• b-

  ATM supports different types of services via AALs. Standardized AALs include AAL1, AAL2, and AAL5, and the rarely used AAL3 and AAL4. AAL1 is used for constant bit rate (CBR) services and circuit emulation. Synchronization is also maintained at AAL1. AAL2 through AAL4 are used for variable bitrate (VBR) services, and AAL5 for data.

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