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mạng máy tínha top down approach 6th edition sinhvienzone com

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone comutions to review questions and problems for the 5th edition of Computer Networking: A Top-Down Approach by Jim Kurose and Keith Ross. These solutions

are being made available to instructors ONLY. Please do NOT copy or distribute this document to others (even other instructors). Please do not post an mạng máy tínha top down approach 6th edition sinhvienzone com

y solutions on a publicly-available Web site. We ll be happy to provide a copy (up-to-date) of this solution manual ourselves to anyone who asks.Ackno

mạng máy tínha top down approach 6th edition sinhvienzone com

wledgments: Over the years, several students and colleagues have helped US prepare this solutions manual. Special thanks goes to HongGang Zhang, Rakes

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone comht 1996-2012 by J.F. Kurose and K.w. Ross. All rights reservedSsnlVieiZcoe <«ntapi: ft.cxi MalAMtntevaChapter 1 Review Questions1There is no differenc

e. Tluoughout this text, the words “host” and “end system" are used interchangeably. End systems include PCs, workstations. Web servers, mail servers. mạng máy tínha top down approach 6th edition sinhvienzone com

PDAs. Internet-connected game consoles, etc.2From Wikipedia: Diplomatic protocol is commonly described as a set of international courtesy rules. Thes

mạng máy tínha top down approach 6th edition sinhvienzone com

e well-established and time-honored rules have made it easier for nations and people to live and work together. Part of protocol has always been the a

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone comls so that people can create networking systems and products that interoperate.41. Dial-up modem over telephone line: home; 2. DSL over telephone line

: home or small office; 3. Cable to HFC: home; 4. 100 Mbps switched Ethernet: enterprise; 5. Wifi (802.11): home and enterprise: 6. 3G and 4G: wide-ar mạng máy tínha top down approach 6th edition sinhvienzone com

ea wireless.5HFC bandwidth is shared among the users. On the downstream channel, all packets emanate from a single source, namely, the head end. Thus,

mạng máy tínha top down approach 6th edition sinhvienzone com

there are no collisions in the downstream channel.6In most American cities, the current possibilities include: dial-up; DSL; cable modem: fiber-to-th

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone comire. It also can run over fibers optic links.9Dial up modems: up to 56 Kbps, bandwidth is dedicated; ADSL: up to 24 Mbps downstream and 2.5 Mbps upstr

eam, bandwidth is dedicated; HFC, rates up to 42.8 Mbps and upstream rates of up to 30.7 Mbps, bandwidth is shared. FTTH: 2-10Mbps upload; 10-20 Mbps mạng máy tínha top down approach 6th edition sinhvienzone com

download; bandwidth is not shared.10There are two popular wireless Internet access technologies today:a)Wifi (802.11) In a wireless LAN. wireless user

mạng máy tínha top down approach 6th edition sinhvienzone com

s transmit receive packets to from an base station (i.e.. wireless access point) within a radius of few tens of meters. The base station is typically

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone come systems, packets are transmitted over the same wireless infrastructure used for cellular telephony, with the base station thus being managed by a te

lecommunications provider. This provides wireless access to users within a radius of tens of kilometers of the base station.tapi. ».«a11At time to the mạng máy tínha top down approach 6th edition sinhvienzone com

sending host begins to transmit. At time ti I. Ri. the sending host completes transmission and the entire packet is received at the router (no propag

mạng máy tínha top down approach 6th edition sinhvienzone com

ation delay). Because the router has the entire packet al time 0, it can begin to transmit the packet to the receiving host al time //. At lime b = l<

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone com delay is ỉ. R; - Ĩ. R>.12A circuit-switched network can guarantee a certain amount of end-to-end bandwidth for the duration of a call. Most packet-sw

itched networks today (including the Internet) cannot make any end-to-end guarantees for bandwidth. 1DM requires sophisticated analog hardware to shif mạng máy tínha top down approach 6th edition sinhvienzone com

t signal into appropriate frequency bands.13a) 2 users can be supported because each user requires half of the link bandwidth.b) Since each user requi

mạng máy tínha top down approach 6th edition sinhvienzone com

res 1Mbps when transmitting, if two or fewer users transmit simultaneously, a maximum of 2Mbps will be required. Since the available bandwidth of the

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone come 3Mbps which is more than the available bandwidth of the shared link, hl this case, there will be queuing delay before the link.c)d)Probability that

a given user is transmitting = 0.2Probability that all three users are transmitting simultaneously= (0.2)5 = 0.008. Since the queue grows when all the mạng máy tínha top down approach 6th edition sinhvienzone com

users are transmitting, the fraction of time during which the queue grows (which is equal to the probability that all three users are transmitting si

mạng máy tínha top down approach 6th edition sinhvienzone com

multaneously) is 0.008.14If the two ISPs do not peer with each other, then when they send traffic to each other they have to send the traffic through

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone compayments to their provider ISPs. An Internet Exchange Points (LXP) (typically in a standalone building with its own switches) is a meeting point where

multiple ISPs can connect and or peer together. An TSP earns its money by charging each of the the ISPs that connect to the ĨXP a relatively small fe mạng máy tínha top down approach 6th edition sinhvienzone com

e. which may depend on the amount of traffic sent to or received from the LXP.15Google's private network connects together all its data centers, big a

mạng máy tínha top down approach 6th edition sinhvienzone com

nd small. Traffic between the Google data centers passes over its private network rather than over the public Internet. Many of these data centers are

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

mạng máy tínha top down approach 6th edition sinhvienzone comtent providers to create these networks? First, the content provider has more control over the user experience, since it has to use few intermediary I

SPs. Second, it can save money by sending less traffic into provider mạng máy tínha top down approach 6th edition sinhvienzone com

Computer Networking: A Top-Down Approach, 6th EditionSolutions to Review Questions and ProblemsVersion Date: May 2012VTills document contains the solu

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