תנ | עמוד 28

סמנו נכון/לא נכון: בעיה נוספת היא ש-TCP מניח שאם נאבדה פאקטה זה בגלל שהיה שימוש בזיכרון מוגזם בנתב והוא זרק את זה כי יש עליו עומס ולכן כל פעם ש-TCP מזהה אובדן פאקטה הוא מקטין את החלון. אבל ההנחה הזו של עומס זיכרון לא מתאימה לעולם של האלחוטי, למשל ברשת סלולרית או וויפי בהחלט ייתכנו איבודי הודעות מסיבות של הפרעות. אז בעצם אנחנו סתם משלמים ברוחב סרט על ידי הקטנה של החלון אם בסך הכל הייתה הפרעה.

1

A server listens over UDP on port 6789 and over TCP on port 2345. Three clients connect to this server at the same time. Each one of these clients runs four apps: two use TCP to connect to the server, and two use UDP to connect to the server. What is the total amount S of sockets required on the server to make this possible? (select the answer closest to your answer)

1

שאלה #139744

		S=10
		S=8
		S=6
		S=4

מיין לפי

Shachar Adam 0 נקודות · יותר מ-6 חודשים

מוניטין: 126

The server has one socket for UDP which is used by all the clients, one TCP server/welcome socket which is used only for accepting connections, and six TCP slave sockets, each dedicated to a connection to a single client.

What is the fairness goal when K TCP sessions share the same bottleneck link of bandwidth R?

1

שאלה #139745

		Each session should have an average rate of R
		Each session should have an average rate of R/K
		Each session should have an average rate of R*K
		There is no defined fairness goal

מיין לפי

What happens when a system has both TCP and UDP processes running?

1

שאלה #139746

		TCP and UDP processes share the bandwidth fairly
		TCP processes share the bandwidth fairly, while UDP processes take what they need
		UDP processes take what they need, leaving the remaining bandwidth for TCP processes to share fairly
		There is no fairness, TCP and UDP processes compete for bandwidth

מיין לפי

What is the key mechanism that enforces fairness between multiple TCP connections?

1

שאלה #139747

		The regulation of the TCP window size
		The prioritization of TCP over UDP traffic
		The number of sockets opened by each process
		There is no fairness mechanism in TCP

נערך לפני 7 חודשים

מיין לפי

What is the potential issue with an application opening multiple TCP connections to get prioritized bandwidth?

1

שאלה #139748

		It has no impact on fairness
		It ensures perfect fairness
		It can lead to a "race to the bottom" where everyone opens more connections, breaking the intended fairness
		TCP fairness is not affected by the number of connections opened

נערך לפני 7 חודשים

מיין לפי

What is the primary responsibility of the network layer, compared to the transport layer?

1

שאלה #139749

		Transferring messages from computer to computer
		Transferring messages between processes

מיין לפי

What are the two key tasks of the network layer, in terms of speed and complexity?

1

שאלה #139750

		Encryption and decryption
		forwarding and routing
		Reliable data delivery and congestion control
		Connection establishment and termination

מיין לפי

When a router receives a packet, how does it quickly determine which outgoing interface to forward the packet through?

1

שאלה #139751

		The router uses a pre-computed, efficient data structure in its routing table
		The router asks the sender which interface to use
		The router randomly selects an outgoing interface

נערך לפני 7 חודשים

מיין לפי

What is the input to the routing algorithm that constructs the router's routing table?

1

שאלה #139752

		The packet headers
		The router's current forwarding decisions
		A map of the network topology
		The routing table of the previous router

נערך לפני 7 חודשים

מיין לפי

תנ

Discuss, Learn and be Happy דיון בשאלות

שאלה #139743

שאלה #139744

What is the fairness goal when K TCP sessions share the same bottleneck link of bandwidth R?

שאלה #139745

What happens when a system has both TCP and UDP processes running?

שאלה #139746

What is the key mechanism that enforces fairness between multiple TCP connections?

שאלה #139747

What is the potential issue with an application opening multiple TCP connections to get prioritized bandwidth?

שאלה #139748

What is the primary responsibility of the network layer, compared to the transport layer?

שאלה #139749

What are the two key tasks of the network layer, in terms of speed and complexity?

שאלה #139750

When a router receives a packet, how does it quickly determine which outgoing interface to forward the packet through?

שאלה #139751

What is the input to the routing algorithm that constructs the router's routing table?

שאלה #139752

		נכון
		לא נכון

תנ

Discuss, Learn and be Happy דיון בשאלות

What is the fairness goal when K TCP sessions share the same bottleneck link of bandwidth R?

What happens when a system has both TCP and UDP processes running?

What is the key mechanism that enforces fairness between multiple TCP connections?

What is the potential issue with an application opening multiple TCP connections to get prioritized bandwidth?

What is the primary responsibility of the network layer, compared to the transport layer?

What are the two key tasks of the network layer, in terms of speed and complexity?

When a router receives a packet, how does it quickly determine which outgoing interface to forward the packet through?

What is the input to the routing algorithm that constructs the router's routing table?

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