Effective CISSP Questions

Terms such as out-of-band transmission, D channel, signaling channel, control plane, etc., depict the idea of separating data flow from control flow. Which of the following is least related to the idea in terms of its design? (Wentz QOTD)
A. Voice over Internet Protocol (VoIP)
B. Integrated Services Digital Network (ISDN)
C. Software Defined Perimeter (SDP)
D. Open Shortest Path First (OSPF)

Kindly be reminded that the suggested answer is for your reference only. It doesn’t matter whether you have the right or wrong answer. What really matters is your reasoning process and justifications.

My suggested answer is D. Open Shortest Path First (OSPF).

Wentz’s book, The Effective CISSP: Security and Risk Management, helps CISSP and CISM aspirants build a solid conceptual security model. It is a tutorial for information security and a supplement to the official study guides for the CISSP and CISM exams and an informative reference for security professionals.

Dynamic Routing
Dynamic Routing (Credit: Wayne Hickey)

OSPF can run as an integral part of a router; it can also run on a controller on the control plane in a software-defined network (SDN) that separates the control plane from the data plane.

SDN Architecture
SDN Architecture

Voice over Internet Protocol (VoIP) typically uses SIP for signaling, while uses RTP for the voice stream.

VoIP: SIP and RTP (Source: Anonymous)

Integrated Services Digital Network (ISDN) uses the D channel for control while uses the B channel for data transmission.

D-Channel as Out-of-band Channel
D-Channel as Out-of-band Channel (Source: Blueworx Product Information Center)

Software-Defined Perimeter (SDP) also separates the control plane from the data plane.

SDP Architecture
SDP Architecture


帶外(out-of-band)傳輸、D通道、信令 道、控制平面(control plane)等術語描述了將數據流與控制流分離的概念。 就其設計而言,以下哪一項與這樣的概念相關性最小? (Wentz QOTD)
A. 互聯網協議語音 (VoIP)
B. 綜合業務數字網(ISDN)
C. 軟件定義邊界 (SDP)
D. 開放最短路徑優先 (OSPF)

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