so muchanswer 1Modulation is the process of CONVERTING data into radio waves by adding information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform -- constant height, or amplitude, and frequencyModulation allows us to send a signal over a bandpass frequency range. If every signal gets its own frequency range, then we can transmit multiple signals simultaneously over a single channel, all using different frequency ranges. Another reason to modulate a signal is to allow the use of a smaller antenna.answer 2modulation techniques are classified into two major types: analog and digital or pulse modulation.The main difference between both modulations is that in frequency modulation, the frequency of the carrier wave is modified as per the transmit data, while in amplitude modulation, the carrier wave is modified according to the data.answer 5Yes. If you have a wireless router that also has Ethernet ports, you can use wired and wireless devices TOGETHER. A LAN that includes both wired and wireless devices is sometimes called a "mixed networkanswer 6Carrier-sense multiple access with collision avoidance (CSMA/CA) in computer networking, is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by beginning transmission only after the channel is sensed to be "idle".answer 7This is due to CSMA/CD's nature of 'listening' if the medium is free before transmitting packets. ... Therefore, CSMA/CA is used on wireless networks. CSMA/CA doesn't detect collisions (UNLIKE CSMA/CA) but rather avoids them through the use of a control message.answer 8RTS/CTS (Request To Send / Clear To Send) is the optional mechanism used by the 802.11 wireless networking protocol to reduce frame collisions introduced by the hidden node problemanswer 9The algorithm of CSMA/CA is: When a frame is ready, the transmitting station checks whether the channel is idle or busy. If the channel is busy, the station waits until the channel becomes idle. If the channel is idle, the station waits for an Inter-frame gap (IFG) amount of time and then sends the frameanswer 10I don't know sorryanswer 11Routing is the process of selecting a path for TRAFFIC in a network or between or across multiple networks. Broadly, routing is performed in many types of networks, including circuit-switched networks, such as the public switched telephone network (PSTN), and computer networks, such as the Internet.In packet switching networks, routing is the higher-level decision making that directs network packets from their source toward their destination through intermediate network nodes by specific packet forwarding mechanisms. Packet forwarding is the TRANSIT of network packets from one network interface to another. Intermediate nodes are typically network hardware devices such as routers, gateways, firewalls, or switches. General-purpose computers also forward packets and perform routing, although they have no specially optimized hardware for the task.worked very very hard to give this answer