Computer Networking and Management Essay Example | Topics and Well Written Essays - 7000 words

Computer Networking and Management - Essay Example However, this is a rare event. The following illustration shows the routing and remote access procedure of the NAT service. You can see that the NAT router sits in the middle of a conversation between the public and the private machine. The packets are translated and then sent to the destination computer at the public end of the equation. The response of the turns, and the route also translates from the public network and returns the response back to the requesting client at the local end. The workstations obtain their IP addresses in the range allowed by the Internet Assigned Numbers Authority (IANA). IANA is responsible for allocating public addresses that are guaranteed to be globally unique on the Internet. However, there is an ever decreasing availability of Ipv4 addresses available as thousands and thousands of additional IP addresses are required daily. In the longer term the development of IPv6 16 byte addresses should resolve this problem. Another factor about IPv6 addresses is that they are expressed in hexadecimal notation with ':' as separators, rather than the current '.' notation of the IPv4 addressing system. The workaround available at the moment on small networks is to reuse IPv4 addresses. Workstations obtain their reusable (i.e. dynamic) IP addresses using a Dynamic Host Configuration Protocol server (DHCP). The DHCP automatically configures the IP address for every host on the network, thus ensuring that each host has a valid, unique IP address. The DHCP automatically reconfigures IP addresses on the fly, i.e. as and when hosts may or may not be present. One of the major advantages of DHCP is that it can save a network administrator many hours of tedious configuration work. DHCP allows individual computers on a TCP/IP network to obtain their configuration information. Specifically, this is their IP address from the server. The DHCP server keeps track of which IP addresses of already been assigned so that when a computer requests an IP address, the DHCP server will offer it an IP address that is not already in use. One of the advantages of an NAT is that firewalls use this method to hide the actual IP address of a host from outside world. In this situation the NAT device must use of a globally unique IP address to represent itself to the Internet. It obtains its global address for communicating with the outside world from the firewall. This firewall address is the address to which forwarded and received packet travel to and from the Internet. Because NAT uses a global IP address for its local network machines, it assists with the general problem of IPv4 addresses being allocated exponentially. The NAT device keeps track of the requesting hosts IP address. It hides this host address and provides its own firewall address to the Internet. The response is received back to the firewall address, and then the NAT router looks of this information about the original request and forwards the information back to the correct host on the internal network. Task3: A) There

Principal barrier to nurseconsumer partnerships Essay

Principal barrier to nurseconsumer partnerships - Essay Example The elderly patients on the whole require more compassion, concentration and patience from the nursing staff to get their message across. There are many factors that increase the difficulty in communication between the nurses and the elderly. Patients perceive good communication as critical to the delivery of health care. (Adiar, 1994, Young, 1995) The common patient barriers to communication involve impaired hearing and vision, difference in the way of acting and verbal expression from the younger generation, cognitive and memory problems, physical problems, and environmental factors such as noise or poor lightening. (Park and Song, 2004) Whereas the common nurse related barriers have been assessed to be stereotyping, poor articulation, and excessive use of medical terminologies. (Lubinski and Wellan, 1997) Many strategies have been described by nurses as being helpful in communication with patients who have verbal difficulties. The cases like of May usually require non verbal communication techniques along with verbal communication. Non verbal communication comprise mainly of seven indices. These are facial movements, gaze, touch, gesticulation, interpersonal spacing, posture and odor. (Barker, 1963, McBride, 1964, Scheflen, 1973, Henley, 1977, Argyle, 1994) Nurses report looking at the patient and picking up clues such as facial expressions, eye gaze, and body language are extremely helpful. Another system is the yes and no system, where by the patient answers to the questions via head nods, eye blinks and foot taps etc. (Hemsley et al, 2001) Watching for expressions on the face of patients such as relief expressions, repeating the questions to ascertain the yes or no response, rephrasing questions, adding animation or signs, and using pen and paper and pictures to communicate ideas have also been regarded as very helpful in achieving communication. (Hemsley et al, 2001) Communication between the nurses and the patients can be improved significantly if nurses were trained to pick them in their surroundings. Nurses should develop an interest in caring for the elderly, since this will improve the overall attitude of the nurse towards providing care. Nurses should provide confidence to the patients so as to allow "disclosure" of patient's weaknesses. (Park and Song, 2005) The removal of physical environmental barriers will also help in better communication development. Many of the older patients do not respond well to the hospital environment. This problem can be alleviated if the nurses introduce and explain the hospital environment, so as to increase familiarity. (Park and Song, 2005) The problem of generation gap can be minimized by educating the nurses of the perceptions of the patients and giving individual nurse care to the patients. (Park and Song, 2005) References Adair L. (1994) The patient's agenda. Nursing Standard 9, 2023. Argyle M,1994 Bodily Communication,2nd Edition, Methuen, London. Barker, RG,1963.The Stream of Behavior, Appleton-Century-Croft, New York Hemsley, Sigafoos, Balandin, Forbes, Taylor, Green, Parmenter, 2001 Nursing the patient with severe communication impairment Journal of Advanced Nursing 35(6), 827835 Henley NM, 1977 Body Politics, Power, Sex and Non verbal Communication. Prenctice Hall,