Importance of Serialization Delay in WAN Design
Question
When designing a WAN that will be carrying real-time traffic, what are two important reasons to consider serialization delay? (Choose two.)
Answers
Explanations
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A. B. C. D. E.BE.
Serialization delay is the time taken to serialize a packet and transmit it on the physical media. When designing a WAN that will be carrying real-time traffic, it is essential to consider serialization delay because it can impact the quality of the transmitted voice, video or any other real-time application.
Here are the explanations for the given answers:
A. Serialization delays are variable because they depend on the line rate of the interface and on the type of the packet being serialized: The serialization delay varies based on the speed of the interface and the type of packet being transmitted. Different types of packets require different amounts of time to serialize due to the header and payload size. So, it is important to consider the serialization delay based on the type of packets and interface speed.
B. Serialization delay depends not only on the line rate of the interface but also on the size of the packet: The serialization delay depends on the line rate of the interface, which is the speed at which data can be transmitted, as well as the size of the packet. A larger packet will take longer to transmit, causing a higher serialization delay.
C. Serialization delays are invariable because they depend only on the line rate of the interface: This answer is incorrect because the serialization delay is not a fixed value, and it depends on multiple factors like the line rate and packet size.
D. Serialization delays are variable because they depend only on the size of the packet being serialized: This answer is also incorrect because the serialization delay depends on the interface speed and the size of the packet being transmitted.
E. Serialization delay is the time required to transmit the packet on the physical media: This answer is correct as serialization delay is the time required to serialize and transmit a packet on the physical media. It is one of the critical factors that affect the quality of real-time applications like voice and video.
In summary, the important reasons to consider serialization delay when designing a WAN that will be carrying real-time traffic are the interface speed, the size of the packet being transmitted, and the type of packet being transmitted. The goal is to ensure that the serialization delay is minimized to avoid any delay, jitter or packet loss, which can impact the quality of real-time applications.
