תנ | עמוד 27

What is the value of the congestion window (cwnd) set to in the event of a timeout, and what mechanism does TCP enter?

1

Describe TCP's Slow Start mechanism.

1

Which of the following features is required for reliable data transfer?

1

שאלה #139695

		Error-detecting code, so the receiver can discard corrupted packets
		Port numbers, to let multiple applications share the same network layer
		Destination MAC, to identify the recipient of the message
		Flow control, to make sure the sender does not overflow the receiver

נערך לפני 7 חודשים

מיין לפי

Shachar Adam 0 נקודות · יותר מ-6 חודשים

מוניטין: 126

Explanation: RDT requires error detecting codes to discard packets. A checksum is one example of such a code. All the other features are nice but not required for RDT.

Which network-layer protocol does the Domain Name Service (DNS) use?

1

שאלה #139696

		IP
		TCP
		UDP
		Trick question! DNS is, in itself, a network layer protocol

מיין לפי

Shachar Adam 0 נקודות · יותר מ-6 חודשים

מוניטין: 126

DNS uses UDP as its transport layer and IP as its network layer.

The "conditional GET" HTTP request message includes an If-Modified-Since: header line. If the object requested by the conditional GET request was not modified after the specified date, the Web server replies with a very short response message only contains the status message “304 Not Modified” and does not include the requested object. Which of the following delays is not reduced if al the computers in your organization start using conditional GET?

1

שאלה #139697

		Propagation delay
		Transmission delay
		Queueing delay
		End-to-end delay

מיין לפי

Shachar Adam 0 נקודות · יותר מ-6 חודשים

מוניטין: 126

Explanation: The propagation delay is a function of the physical shape of the network and is not reduced. Transmission is directly reduced because of shorter responses, and queueing is indirectly reduced due to less load on the ingress port of the router connecting your organization to the Internet. End-to-end delay includes both transmission and queueing so it is also reduced.

Your phone is acting as a wireless hotspot with built-in NAT functionality. It receives a UDP packet from the WiFi network and routes it to the 5G network. Which fields in the packet are not modified by the phone?

1

שאלה #139698

		Destination Port
		Destination MAC
		Source Port
		Source IP

מיין לפי

Shachar Adam 0 נקודות · יותר מ-6 חודשים

מוניטין: 126

Explanation: The WiFi network created by your hotspot is the internal network, and the cellular 5G network is the external network. A NAT processing outgoing traffic will replace the source port and source IP with values from the NAT table, and all routers replace the source and destination MACs.

Why does TCP aim for around 75% network utilization?

1

שאלה #139739

		Because reaching 100% utilization leads to long queues and increased delays
		Because it ensures the fastest data transmission speed
		Because it maximizes the available bandwidth for other connections
		Because it guarantees zero packet loss during transmission

מיין לפי

What is one assumption of TCP that might not hold true in modern high-speed networks?

1

שאלה #139740

		Packet loss is primarily due to network congestion
		The delay in the network is negligible
		The number of bits flying at once is not too large
		Bandwidth is evenly distributed across all connections

מיין לפי

What extension to TCP addresses the issue of inefficient bandwidth utilization in short-lived connections?

1

שאלה #139741

		Long Fat TCP
		TCP for Wireless Networks
		High-Speed TCP
		Data Center TCP

מיין לפי

What is one of the issues with TCP in long fat networks?

1

שאלה #139742

		Excessive memory usage in routers
		Loss of packets due to router congestion
		Inability to efficiently utilize high bandwidth and high delay networks
		Lack of compatibility with modern Wi-Fi standards

מיין לפי

		The congestion window size remains unchanged, and TCP enters congestion avoidance.
		The congestion window size is halved, and TCP enters slow start
		The congestion window size is set to 1, and TCP enters slow start
		The congestion window size is doubled, and TCP enters congestion avoidance

		It maintains a constant window size until the first loss event
		It exponentially increases the congestion window until the first loss event is detected.
		It halves the congestion window size after the first loss event
		It decreases the congestion window linearly upon connection establishment

תנ

Discuss, Learn and be Happy דיון בשאלות

What is the value of the congestion window (cwnd) set to in the event of a timeout, and what mechanism does TCP enter?

שאלה #139689

Describe TCP's Slow Start mechanism.

שאלה #139691

Which of the following features is required for reliable data transfer?

שאלה #139695

Which network-layer protocol does the Domain Name Service (DNS) use?

שאלה #139696

שאלה #139697

Your phone is acting as a wireless hotspot with built-in NAT functionality. It receives a UDP packet from the WiFi network and routes it to the 5G network. Which fields in the packet are not modified by the phone?

שאלה #139698

Why does TCP aim for around 75% network utilization?

שאלה #139739

What is one assumption of TCP that might not hold true in modern high-speed networks?

שאלה #139740

What extension to TCP addresses the issue of inefficient bandwidth utilization in short-lived connections?

שאלה #139741

What is one of the issues with TCP in long fat networks?

שאלה #139742

תנ

Discuss, Learn and be Happy דיון בשאלות

What is the value of the congestion window (cwnd) set to in the event of a timeout, and what mechanism does TCP enter?

Describe TCP's Slow Start mechanism.

Which of the following features is required for reliable data transfer?

Which network-layer protocol does the Domain Name Service (DNS) use?

Your phone is acting as a wireless hotspot with built-in NAT functionality. It receives a UDP packet from the WiFi network and routes it to the 5G network. Which fields in the packet are not modified by the phone?

Why does TCP aim for around 75% network utilization?

What is one assumption of TCP that might not hold true in modern high-speed networks?

What extension to TCP addresses the issue of inefficient bandwidth utilization in short-lived connections?

What is one of the issues with TCP in long fat networks?

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