... 2:The Data-Link Layer 75 Layer 3:The Network Layer 77 Layer 4:The Transport Layer 78 Layer 5:The Session Layer 78 Layer 6:The Presentation Layer 79 Layer 7: The Application Layer 80OSI and DoD ... ContentsCreating an Integration Plan 178 Beginning the Collocation Planning 178 Performing a Risk Analysis 179 Creating an Action Plan 179 Preparing the Planning Deliverables 180Developing the Network Architecture ... 25Modulating a Radio Signal 27 Propagating a Strong Radio Signal 34Understanding Signal Power andSignal-to-Noise Ratio 35Attenuation 36Rain Attenuation 39Bouncing 39Refracting 41Line...
... technology.Around the same time that Faraday worked with electromagnetism,an American professor named Joseph Henry became the first person totransmit a practical electrical signal. As a watchmaker, he constructedbatteries ... 273 Tracking the Administration Needs 274 Tracking the Athletic Needs 275 Tracking the Academic DepartmentNeeds 276 Tracking Student Union Needs 277 Tracking Student Needs 277 Constraints and ... CO.152_wan_FM 6/22/01 4:18 PM Page xii xviii ContentsCreating an Integration Plan 178 Beginning the Collocation Planning 178 Performing a Risk Analysis 179 Creating an Action Plan 179 Preparing...
... thesignal cannot penetrate metal. Assume you have a metal sphere. As anEM wave hits the leading edge of the sphere, it acts like an antenna, andthe wave induces a voltage in the metal.This voltage ... data. An example of this is when an animal is tagged with a transmitter and the signal is collected and data is gathered over a periodof time to be interpreted at a later date.Monitoring applications ... magnetic field, the magnetic fields create additionalelectric fields, and the wave propagates away from the antenna. 7. Receiver Antenna Similar to the transmitter antenna, thereceiver antenna...
... mounted flat on a wall, yet still have the proper-ties and gain of a directional antenna. Figure 2. 17 shows a planar arrayantenna.www.syngress.comFigure 2. 17 Planar Array Antenna and Associated ... antennas.Planar Array AntennasPlanar array antennas are similar in concept to Yagi antennas except allelements, both active and parasitic, lie in the same plane.This results in a flat antenna that can be mounted ... Directional Beam PatternSide ViewPlanar Phased Array AntennaDirection of BeamAntennaGDirectional BeamMultiple Antenna Elements Shown with Dipole AntennasTop ViewSteerable BeamPlanar Array...
... for maintainingIP addresses, you can get the details necessary to obtain a range. InNorth America, South America, the Caribbean, and sub-SaharanAfrica, the organization responsible is the Address ... routed to a different link. A dynamically routed network is capable of facilitating these types ofchanges.How is an algorithm aware that the network has changed?Remember that an algorithm ... atwww.ripe.net. Lastly, for the Asia/Pacific region, the organization isthe Asia/Pacific Network Information Centre (APNIC), which canbe found at www.apnic.net.Q: When using PAT, how can I accommodate all...
... canauthenticate awireless device against a list of MAC addresses.This listcould reside locally on the AP, or the authentication could be checkedagainst a database of allowed MACs located on the ... received andwill transmit it again.All this takes place at the MAC layer. Noticing that an ACK has notbeen received, the sending unit is able to grab the radio medium beforeany other unit can and ... signals do not radiate as far, and as wementioned, the frequencies are reused as much as we desire as long asthe cells are spaced apart appropriately.Mobile technology has developed with various...
... theirgreatest weaknesses.The same can be said when examining the attributesof awireless network. Both mobility and ease of access are touted assome of the greatest characteristics available when ... with an issue before escalating it?■How will an escalation take place?■Which procedures will be automated?■What tools are available to which organization?■What security changes are required?Depending ... channel spacing and active channel separation play an importantrole when planning and deploying awireless network. These aspectsrefer to the amount of space between contiguous or active channels...
... functionalboundary of the warehouse naturally makes it a separate subdomain.Thewww.syngress.com152_wan_ 07 6/21/01 3:25 PM Page 239 234 Chapter 7ã Designing aWireless Industrial Network: Retail Case ... OfficeOfficeOfficeBreakRoomAPAP152_wan_06 6/21/01 3:24 PM Page 219 Designing aWireless Enterprise Network: Hospital Case Study ã Chapter 6 225Place the directional antenna so that the antenna energy ... departments on the first floorof Pro Sports.The first floor contains various clothing departments, a shoe department, a baseball/soccer department, a golf department, a sea-sonal department, and a...
... academic areas ofthe campus. At this time, only three academic areas are addressed.Theplanned network must be easy to adapt as these areas of study increase orchange. For example, the Math and ... Athletic department mayhave functional groups of coaches, players, and the press.TheAdministrative department may designate a Financial functional group, aswell as Student Records and Management ... as encryptionand password allocation to ensure the concept of fair play and remainwithin NCAA rules and guidelines. Both teams must have equal capabil-ities to meet NCAA rules.Visiting coaching...
... of raw data passed through a link or network and includes both overhead signaling data as well as userdata.Throughput refers to the actual amount of user data passedthrough the link or network. Q: ... Page 296 300 Chapter 8 ã Designing aWireless Campus Network: University Case Study A: Signal power and antenna type are the two primary factors in therange of the signal. Noise levels can also ... signal.The key advantages of the HomeRF 2.0 standard are that it inte-grates the voice and data channels over the same wireless transport pro-tocol, handles multimedia streams effectively, and supports...