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You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter jimwilluk Start date Mar 2, To my great concern, the available broadband is veeery slow so I'm trying to hatch a plan to survive coming from a solid Mbps fibre connection. I run a small startup, working entirely from home for the foreseeable future, so a decent connection is pretty essential. Apparently Mbps is achievable from this, though I've it also does get congested and slow down at times.
The plan I have been doing some research and am thinking to get both a slow broadband connection and a 4G router and using a load balancer to help route traffic depending on what's needed. The wired broadband could do cover most day-to-day Upstream And Downstream Aptitude Questions With tasks and perhaps things that require low latency? I'm aware load balancing is not a silver bullet, but it seems like doing anything more like channel bonding is not worth the hassle or cost.
Here's the results from BT wholesale checker, which indicates speeds of Mbps. I use a Draytek bought cheaply off ebay, it's been used to load balance adsl and mobile, area wifi and mobile and now mobile and mobile. You can leave it to self manage and that works most of the time or get it fixed on one connection and it automatically changed to the other a few seconds after the first fails.
EE will give the best downloads. As for hardware I have never used that lot so cannot comment. If you want to separate traffic like that, it's best you maintain 2 separate networks SSIDs rather than try to balance them, imho.
Get the B, it's prolly the best 4G router available. O2 claim reasonable coverage of your post code, you could try with a giffgaff sim. Iamhere Casual Member. Depending on how far along the chain you are might be worth factoring in the cost of FTTP as part of any potential work you may need doing when you move in. Granted will be expensive though. GaryW Regular Member. I'd echo a combination of what others have said.
Which layers does a host process? Routers process: Router is network layer device, which is capable of processing header information of network, link and physical layers. What is the difference between a virus and a worm? Virus: they requires some form of human interaction to replicate or spread. Classic example: Spam or E-mail viruses. Describe how a botnet can be created, and how it can be used for a DDoS attack. Suppose Alice and Bob are sending packets to each other over a computer network.
Suppose Trudy positions herself in the network so that she can capture all the packets sent by Alice and send whatever she wants to Bob; she can also capture all the packets sent by Bob and send whatever she wants to Alice. List some of the malicious things Trudy can do from this position.
Trudy can pretend to be Bob to Alice and vice-versa and partially or completely modify the message s being sent from Bob to Alice. Furthermore, Trudy can even drop the packets that are being sent by Bob to Alice and vise-versa , even if the packets from Bob to Alice are encrypted. Your protocol entities should be able to handle the all-too-common case in which there is not enough money in the account to cover the withdrawal.
Sketch the operation of your protocol for the case of a simple withdrawal with no errors, using a diagram similar to that in Figure 1. Explicitly state the assumptions made by your protocol about the underlying end-to-end transport service. Equation 1. Generalize this formula for sending P such packets back-to-back over the N links. Consider an application that transmits data at a steady rate for example, the sender generates an N-bit unit of data every k time units, where k is small and fixed.
Also, when such an application starts, it will continue running for a relatively long period of time. Answer the following questions, briefly justifying your answer:. Consider the circuit-switched network in Figure 1. Recall that there are 4 circuits on each link. Label the four switches A, B, C and D, going in the clockwise direction. Review the car-caravan analogy in Section 1. A tollbooth services a car at a rate of one car every 12 seconds. This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking.
Consider two hosts, A and B, connected by a single link of rate R bps. Host A is to send a packet of size L bits to Host B. Host A converts analog voice to a digital 64 kbps bit stream on the fly. Host A then groups the bits into byte packets. There is Upstream And Downstream Aptitude Questions one link between Hosts A and B; its transmission rate is 2 Mbps and its propagation delay is 10 msec. As soon as Host A gathers a packet, it sends it to Host B. How much time elapses from the time a bit is created from the original analog signal at Host A until the bit is decoded as part of the analog signal at Host B?
A ��������2Mbps �������B. Consider the first bit in a packet. Before this bit can be transmitted, all of the bits in the packet must be generated. This requires. A similar analysis shows that all bits experience a delay of Suppose users share a 3 Mbps link. Also suppose each user requires kbps when transmitting, but each user transmits only 10 percent of the time.
See the discussion of packet switching versus circuit switching in Section 1. Suppose that the 1 Mbps link is replaced by a 1 Gbps link. Consider a packet of length L which begins at end system A and travels over three links to a destination end system.
These three links are connected by two packet switches. Suppose now the packet is 1, bytes, the propagation speed on all three links is 2. For these values, what is the end-to-end delay? Further suppose the packet switch does not store-and-forward packets but instead immediately transmits each bit it receives before waiting for the entire packet to arrive. What is the end-to-end delay? As bits are immediately transmitted, the intermediate nodes switch or router does not introduce any transmission delay; Thus,.
A packet switch receives a packet and determines the outbound link to which the packet should be forwarded. When the packet arrives, one other packet is halfway done being transmitted on this outbound link and four other packets are waiting to be transmitted. Packets are transmitted in order of arrival. Suppose all packets are 1, bytes and the link rate is 2 Mbps.
What is the queuing delay for the packet? More generally, what is the queuing delay when all packets have length L, the transmission rate is R, x bits of the currently-being-transmitted packet have been transmitted, and n packets are already in the queue? Consider the queuing delay in a router buffer.
Based on the formula for the total delay i. Consider a router buffer preceding an outbound link. Let N denote the average number of packets in the buffer plus the packet being transmitted. Let a denote the rate of packets arriving at the link. Let d denote the average total delay i. Suppose that on average, the buffer contains 10 packets, and the average packet queuing delay is 10 msec. Perform a Traceroute between source and destination on the same continent at three different hours of the day.
Do it your self. Use websites hosted in countries said in question. Consider the throughput example corresponding to Figure 1. Now suppose that there are M client-server pairs rather than Assume all other links have abundant capacity and that there is no other traffic in the network besides the traffic generated by the M client-server pairs.
Consider Figure 1. Now suppose that there are M paths between the server and the client. No two paths share any link. If the server can only use one path to send data to the client, what is the maximum throughput that the server can achieve? If the server can use all M paths to send data, what is the maximum throughput that the server can achieve?
Given that there are M paths between server and client. Also No two paths share any link. To achieve Maximum throughput, one has to choose the Maximum throughput out of all the available paths. Suppose that each link between the server and the client has a packet loss probability p,and the packet loss probabilities for these links are independent. What is the probability that a packet sent by the server is successfully received by the receiver? If a packet is lost in the path from the server to the client, then the server will re-transmit the packet.
On average, how many times will the server re-transmit the packet in order for the client to successfully receive the packet? Suppose we send a pair of packets back to back from the server to the client, and there is no other traffic on this path. Assume each packet of size L bits, and both links have the same propagation delay d prop. Suppose you would like to urgently deliver 40 terabytes data from Boston to Los Angeles. You have available a Mbps dedicated link for data transfer.
Would you prefer to transmit the data via this link or instead use FedEx overnight delivery? But with FedEx overnight delivery, the delivery can be expected within 5 days. Suppose the propagation speed over the link is 2. Referring to problem Q25, suppose we can modify R.
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