State two major requirements on practically applicable codes used in CDMA networks, and analyse the impacts of “bad” codes on the performance of CDMA networks.
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State two major requirements on practically applicable codes used in CDMA networks, and analyse the impacts of “bad” codes on the performance of CDMA networks.
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- Shielded twisted-pair (STP) cabling was first made popular by IBM when it introduced Type classification for data cabling. Though to purchase and install than UTP, STP offers some distinct advantages. Shielded twisted-pair (STP) cable can up to 600MHZ. STP has an more currently support applications requiring shield that consists of braided . The shield surrounds the 150-ohm, 22 AWG, two-pair conductors. Each is insulated with a to install than UTP. STP cabling solely material and then each twisted pair is individually shielded. STP cabling is because it provides better EMI protection and potential bandwidth, installers consider using fiber-optic cable instead. conductor copper material bandwidth expensive dielectric inner glass Cheap lower Interference expensive WAN higher outerc) Analyse and discuss the difference between vulnerable times for slotted ALOHA and CSMA.Assume that a reliable delivery of data from a machine M1 to another machine M2 is provided through many intermediate machines. All the intermediate links of these machines are not prone to error such as that in the case of present day wired networks. What layer or layers (transport, network, or data link layer) one will choose to provide reliability? What layer or layers one will choose to not provide reliability? Justify with explanation for both affirmative and negative selections.
- Question 4 a) Mention two (2) advantages that infrared communication has against microwave. b) List and briefly define important factors that can be used in evaluating or comparing the various digital-to-digital encoding techniques. c) What is the difference between QPSK and offset QPSK? d) Five channels, each with a l00 kHz bandwidth, are to be multiplexed together. What is the minimum bandwidth of the link if there is a need for a guard band of 10kHz between the channels to prevent interference?A 1-km-long, 10-Mbps CSMA/CD LAN (i.e., Classic Ethernet)has a propagation speed of 200 m/μsec (i.e., how fast the radio signal moves on the link). Thereare no repeaters in this system. Data frames are 512 bits long, including 480 bits of payload (i.e.,effective data) and 32 bits of overhead (e.g., header, checksum, and other overhead fields). Everydata frame should be confirmed by a 64-bit ACK frame. We assume the sender needs to use onecontention slot to seize the channel before transmitting the data frame, and the receiver needsto use one contention slot to seize the channel before transmitting the ACK frame. Answer thefollowing questions: a. What is the minimum length of a contention slot in μsec? b. What is the effective data rate for the sender to send one data frame? Assume that there areno collisions. Show the calculation c. What would be the impact on the total delay and the effective data rate if we used a longerdata payload size in the data frame? Given one application…One important issue in networking is the performance of the network. The question is how can measure the performance of heterogeneous networks. For example, UIT network which provides access to students at both wired and wireless networks. In this kind of scenario: a) You may need to define key performance parameters that can be used to evaluate the network performance. b) If UIT has a total bandwidth of 100Mbps and 40Mbps is reserved for admin and faculty. Due to COVID-19 pandemic total students coming daily altogether in morning and evening are 500. How much bandwidth a student can achieve if all students are using internet at the same time?
- course: Data communication and communication Networks Q: Compare the different TCP variants (Tahoe, Reno, New Reno, and SACK) forcongestion control and congestion avoidance mechanisms highlighting advantagesand disadvantages. You are also required to discuss the fairness of their congestioncontrol mechanisms using Raj Jain’s Fairness Index.QUESTION 23 Describe what is propose of using OSI Model Describe each layer of OSI model in short answer then list the name of layer ordering from bottom to up For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).Question #2 One important issue in networking is the performance of the network. The question is how can measure the performance of heterogeneous networks. For example, UIIT network which provides access to students at both wired and wireless networks. In this kind of scenario: a).You may need to define key performance parameters that can be used to evaluate the network performance? b).If UIIT has a total bandwidth of 100Mbps and 40Mbps is reserved for admin and faculty. Due to COVID-19 pandemic total students coming daily altogether in morning and evening are 500. How much bandwidth a student can achieve if all students are using internet at the same time?
- Write an essay on ODVA implementations. Your Essay should have at least four (4) pages (double spaced) and should briefly describe each of the four (4) data link infrastructures over which CIP can operate, and include a table where you compare each data link protocol with a set of at least 5 characteristics (compatibilities with IOT, message size, cost of minimal implementation, etc.) and mark which characteristics is/are present on each infrastructure for CIP. Comment on why these DL infrastructure alternatives.Low-power wide area networks (LPWAN) have both licensed and unlicensed spectral versions for Internet-of-Things (IoT) applications. Based on what you have learnt in Block 3, Parts 3 and 4, write a short comparison of the key features of the LPWAN unlicensed and licensed spectrum versions for IoT applications. Your comparison should briefly discuss the following: The relative costs of each version The different infrastructures used The respective interference levels The maximum word limit for your answer is 300 wordsParameters are more important for an industrial network compared to office automation networks: 1) Determinism, Latency and High Speed2) Latency, packet loss and bandwidth3) Determinism, Latency and Bandwidth4) Determinism, Latency and Reliability5) Jitter, Band and Determinism