A triangle wave with period T0 = 1/20 has the truncated Fourier expansion (recall Week 5 for CT Fourier series) x(t) = cos(2π · 20t) + 1 9 cos(3 · 2π · 20t) + 1 25 cos(5 · 2π · 20t) (i) Write a Matlab program that adds noise randn(1, N) to this triangle wave. (ii) Use a sampling rate of 44100 samples per second and signal length N = 11025 to get a discretetime signal x[n]. (iii) Use thresholding and DFT to eliminate the noise in the signal. (iv) Plot the noisy and filtered wave forms for 0 ≤ t ≤ 0.25.

Match each vocabulary word to its definition.1. desktoppicture used to represent acomputer application2. domainnetwork protectionsoftware code that can be viewed,3. iconmodified, and redistributed for freethe background screen on acomputer monitor4. url5. blogan online journalthe part of an internet address that6. firewallrefers to a group of computers on anetworkonline database of web pages7. intranetnetwork for use by an individual8. open address of a web page or9. wikiresource

Usually, when we sniff packets, we are only interested certain types of packets. we can do that by setting filters in sniffing. scapy’s filter use the bpf (berkeley packet filter) syntax; you can find the bpf manual from the internet. set the following filters and demonstrate your sniffer program again (each filter should be set separately): (a) capture only the icmp packet. (b) capture any tcp packet that comes from a particular ip and with a destination port number 23. (c) capture packets comes from or to go to a particular subnet. you can pick any subnet, such as 128.230.0.0/16; you should not pick the subnet that your vm is attached to.

Annie is creating a corporate report for a company’s annual meeting. in the report, she wants to add the signature of various department heads. which device can annie use to capture signatures to include in the report? a. printer b. monitor c. e-reader d. digitizing tablet