Aperture is a powerful digital photography application designed to help you produce the best images possible. However, many factors outside of Aperture can affect the quality of your images. Being mindful of all these factors can help prevent undesirable results.
The following chapters explain how your camera captures a digital image, how images are displayed onscreen [...]
Ethernet with thick coaxial (coax) wire uses cable type RG08. Connectivity from the NIC travels through a transceiver cable to an external transceiver and finally through the thick coax cable. Due to signal degradation, a segment is limited to fewer than 500 meters, with a maximum of 100 stations per segment of 1,024 stations total.
Connectionless traffic generated by NetBIOS utilizes NetBEUI as the transmission process. For example, when a station issues a NetBIOS command, whether it is Add Name or Add Group, it is NetBEUI that sends out frames to verify whether the name is already in use on the network. Another example of the NetBIOS-NetBEUI relationship is the [...]
The first Ethernet, Ethernet DIX, was named after the companies that proposed it: Digital, Intel, and Xerox. During this time, the Institute of Electrical and Electronics Engineers (IEEE) had been working on Ethernet standardization, which became known as Project 802. Upon its success, the Ethernet plan evolved into the IEEE 802.3 standard. Based on carrier [...]
The Internet Control Message Protocol (ICMP) delivers message packets, reporting errors and other pertinent information to the sending station or source. Hosts and infrastructure equipment use this mechanism to communicate control and error information, as they pertain to IP packet processing. ICMP Format, Encapsulation, and Delivery ICMP message encapsulation is a two- fold process. The [...]
UDP provides multiplexing (the method for multiple signals to be transmitted concurrently into an input stream, across a single physical channe l) and demultiplexing (the actual separation of the streams that have been multiplexed into a common stream back into multiple output streams) between protocol and application software.
Multiplexing and demultiplexing, as they pertain to UDP, [...]
Continue reading about Multiplexing, Demultiplexing, and Port Connections
The User Datagram Protocol (UDP) operates in a connectionless fashion; that is, it provides the same
unreliable, datagram delivery service as IP. Unlike TCP, UDP does not send SYN/ACK bits to assure delivery and reliability of transmissions. Moreover, UDP does not include flow control or error recovery functionality. Consequently, UDP messages can be lost, duplicated, or [...]
TCP organizes and counts bytes in the data stream using a 32-bit sequence number. Every TCP packet contains a starting sequence number (first byte) and an acknowledgment number (last byte). A concept known as a sliding window is implemented to make stream transmissions more efficient. The sliding window uses bandwidth more effectively, because it will [...]
The Reverse Address Resolution Protocol (RARP), to some degree, is the opposite of ARP. Basically, RARP allows a station to broadcast its hardware address, expecting a server daemon to respond with an available IP address for the station to use. Diskless machines use RARP to obtain IP addresses from RARP servers.
Remoting is mostly used to allow one machine to communicate with an application on another across a private network or even across a public network like the Internet. In all cases, security is a very real issue. Your application communicates data across a wire while a server listens for client requests. [...]
