Business Data Networks & Security (Panko)- Ch 1- The Cloud

a packet switch - makes forwarding decisions about where to send a packet next based on destination address. about how long is a packet - a typical packet is 100 bytes long Are network speeds usually mesured in bits per second or bytes per second? - network speeds are measured in BPS (Bits Per Second) Compare and contrast these two types of circuits - Dial Up has reserved capacity during use - Only exists for duration of the call - Low Speeds - Inexpensive Leased Line Circuit - Reserved capacity during use - Always on - fast speeds - expensive describe amplitude modulation briefly - a 1 is represented by a loud signal a 0 is represented by a soft signal Distinguish between analog and binary - analog - transm its sounds binary - transmits two states (conditions) - voltage levels - digital Frames vs Packets - Packets at the Data link later are called (FRAMES