自顶向下网络设计（英文版 第3版）

introduction　xxii

part i　identifying your customer's needs and goals　

chapter 　analyzing business goals and constraints　

using a top-down network design methodology　

using a structured network design process　

systems development life cycles　

plan design implement operate optimize (pdioo) network lifecycle　

analyzing business goals　

working with your client　

changes in enterprise networks　

networks must make business sense　

networks offer a service　

the need to support mobile users　

the importance of network security and resiliency　

typical network design business goals　

identifying the scope of a network design project　

identifying a customer's network applications　

analyzing business constraints　

politics and policies　.budgetary and staffing constraints　

project scheduling　

business goals checklist　

summary　

review questions　

design scenario　

chapter 　analyzing technical goals and tradeoffs　

scalability　

planning for expansion　

expanding access to data　

constraints on scalability　

availability　

disaster recovery　

specifying availability requirements　

five nines availability　

the cost of downtime　

mean time between failure and mean time to repair　

network performance　

network performance definitions　

optimum network utilization　

throughput　

throughput of internetworking devices　

application layer throughput　

accuracy　

efficiency　

delay and delay variation　

causes of delay　

delay variation　

response time　

security　

identifying network assets　

analyzing security risks　

reconnaissance attacks　

denial-of-service attacks　

developing security requirements　

manageability　

usability　

adaptability　

affordability　

making network design tradeoffs　

technical goals checklist　

summary　

review questions　

design scenario　

chapter 　characterizing the existing internetwork　

characterizing the network infrastructure　

developing a network map　

characterizing large internetworks　

characterizing the logical architecture　

developing a modular block diagram　

characterizing network addressing and naming　

characterizing wiring and media　

checking architectural and environmental constraints　

checking a site for a wireless installation　

performing a wireless site survey　

checking the health of the existing internetwork　

developing a baseline of network performance　

analyzing network availability　

analyzing network utilization　

measuring bandwidth utilization by protocol　

analyzing network accuracy　

analyzing errors on switched ethernet networks　

analyzing network efficiency　

analyzing delay and response time　

checking the status of major routers, switches, andfirewalls　

network health checklist　

summary　

review questions　

hands-on project　

design scenario　

chapter 　characterizing network traffic　

characterizing traffic flow　

identifying major traffic sources and stores　

documenting traffic flow on the existing network　

characterizing types of traffic flow for new networkapplications　

terminal/host traffic flow　

client/server traffic flow　

peer-to-peer traffic flow　

server/server traffic flow　

distributed computing traffic flow　

traffic flow in voice over ip networks　

documenting traffic flow for new and existing networkapplications　

characterizing traffic load　

calculating theoretical traffic load　

documenting application-usage patterns　

refining estimates of traffic load caused by applications　

estimating traffic load caused by routing protocols　

characterizing traffic behavior　

broadcast/multicast behavior　

network efficiency　

frame size　

windowing and flow control　

error-recovery mechanisms　

characterizing quality of service requirements　

atm qos specifications　

constant bit rate service category　

real-time variable bit rate service category　

non-real-time variable bit rate service category　

unspecified bit rate service category　

available bit rate service category　

guaranteed frame rate service category　

ietf integrated services working group qos specifications　

controlled-load service　

guaranteed service　

ietf differentiated services working group qosspecifications　

grade of service requirements for voice applications　

documenting qos requirements　

network traffic checklist　

summary　

review questions　

design scenario　

summary for part i　

part ii　logical network design　

chapter 　designing a network topology　

hierarchical network design　

why use a hierarchical network design model?　

flat versus hierarchical topologies　

flat wan topologies　

flat lan topologies　

mesh versus hierarchical-mesh topologies　

classic three-layer hierarchical model　

core layer　

distribution layer　

access layer　

guidelines for hierarchical network design　

redundant network design topologies　

backup paths　

load sharing　

modular network design　

cisco safe security reference architecture　

designing a campus network design topology　

spanning tree protocol　

spanning tree cost values　

rapid spanning tree protocol　

rstp convergence and reconvergence　

selecting the root bridge　

scaling the spanning tree protocol　

virtual lans　

fundamental vlan designs　

wireless lans　

positioning an access point for maximum coverage　

wlans and vlans　

redundant wireless access points　

redundancy and load sharing in wired lans　

server redundancy　

workstation-to-router redundancy　

hot standby router protocol　

gateway load balancing protocol　

designing the enterprise edge topology　

redundant wan segments　

circuit diversity　

multihoming the internet connection　

virtual private networking　

site-to-site vpns　

remote-access vpns　

service provider edge　

secure network design topologies　

planning for physical security　

meeting security goals with firewall topologies　

summary　

review questions　

design scenario　

chapter 　designing models for addressing and numbering　

guidelines for assigning network layer addresses　

using a structured model for network layer addressing　

administering addresses by a central authority　

distributing authority for addressing　

using dynamic addressing for end systems　

ip dynamic addressing　

ip version dynamic addressing　

zero configuration networking　

using private addresses in an ip environment　

caveats with private addressing　

network address translation　

using a hierarchical model for assigning addresses　

why use a hierarchical model for addressing and routing?　

hierarchical routing　

classless interdomain routing　

classless routing versus classful routing　

route summarization (aggregation)　

route summarization example　

route summarization tips　

discontiguous subnets　

mobile hosts　

variable-length subnet masking　

hierarchy in ip version addresses　

link-local addresses　

global unicast addresses　

ipv addresses with embedded ipv addresses　

designing a model for naming　

distributing authority for naming　

guidelines for assigning names　

assigning names in a netbios environment　

assigning names in an ip environment　

the domain name system　

dynamic dns names　

ipv name resolution　

summary　

review questions　

design scenario　

chapter 　selecting switching and routing protocols　

making decisions as part of the top-down network designprocess　

selecting switching protocols　

switching and the osi layers　

transparent bridging　

selecting spanning tree protocol enhancements　

portfast　

uplinkfast and backbonefast　

unidirectional link detection　

loopguard　

protocols for transporting vlan information　

ieee .q　

dynamic trunk protocol　

vlan trunking protocol　

selecting routing protocols　

characterizing routing protocols　

distance-vector routing protocols　

link-state routing protocols　

routing protocol metrics　

hierarchical versus nonhierarchical routing protocols　

interior versus exterior routing protocols　

classful versus classless routing protocols　

dynamic versus static and default routing　

on-demand routing　

scalability constraints for routing protocols　

routing protocol convergence　

ip routing　

routing information protocol　

enhanced interior gateway routing protocol　

open shortest path first　

intermediate system-to-intermediate system　

border gateway protocol　

using multiple routing protocols in an internetwork　

routing protocols and the hierarchical design model　

redistribution between routing protocols　

integrated routing and bridging　

a summary of routing protocols　

summary　

review questions　

design scenario　

chapter 　developing network security strategies　

network security design　

identifying network assets　

analyzing security risks　

analyzing security requirements and tradeoffs　

developing a security plan　

developing a security policy　

components of a security policy　

developing security procedures　

maintaining security　

security mechanisms　

physical security　

authentication　

authorization　

accounting (auditing)　

data encryption　

public/private key encryption　

packet filters　

firewalls　

intrusion detection and prevention systems　

modularizing security design　

securing internet connections　

securing public servers　

securing e-commerce servers　

securing remote-access and vpns　

securing remote-access technologies　

securing vpns　

securing network services and network management　

securing server farms　

securing user services　

securing wireless networks　

authentication in wireless networks　

data privacy in wireless networks　

summary　

review questions　

design scenario　

chapter 　developing network management strategies　

network management design　

proactive network management　

network management processes　

fault management　

configuration management　

accounting management　

performance management　

security management　

network management architectures　

in-band versus out-of-band monitoring　

centralized versus distributed monitoring　

selecting network management tools and protocols　

selecting tools for network management　

simple network management protocol　

management information bases (mib)　

remote monitoring (rmon)　

cisco discovery protocol　

cisco netflow accounting　

estimating network traffic caused by network management　

summary　

review questions　

design scenario　

summary for part ii　

part iii　physical network design　

chapter 　selecting technologies and devices for campusnetworks　

lan cabling plant design　

cabling topologies　

building-cabling topologies　

campus-cabling topologies　

types of cables　

lan technologies　

ethernet basics　

ethernet and ieee .　

ethernet technology choices　

half-duplex and full-duplex ethernet　

-mbps ethernet　

gigabit ethernet　

-gbps ethernet　

selecting internetworking devices for a campus networkdesign　

criteria for selecting campus internetworking devices　

optimization features on campus internetworking devices　

example of a campus network design　

background information for the campus network design project　

business goals　

technical goals　

network applications　

user communities　

data stores (servers)　

current network at wvcc　

traffic characteristics of network applications　

summary of traffic flows　

performance characteristics of the current network　

network redesign for wvcc　

optimized ip addressing and routing for the campus backbone　

wireless network　

improved performance and security for the edge of thenetwork　

summary　

review questions　

design scenario　

chapter 　selecting technologies and devices for enterprisenetworks　

remote-access technologies　

ppp　

multilink ppp and multichassis multilink ppp　

password authentication protocol and challenge handshake

authentication protocol　

cable modem remote access　

challenges associated with cable modem systems　

digital subscriber line remote access　

other dsl implementations　

ppp and adsl　

selecting remote-access devices for an enterprise

network design　

selecting devices for remote users　

selecting devices for the central site　

wan technologies　

systems for provisioning wan bandwidth　

leased lines　

synchronous optical network　

frame relay　

frame relay hub-and-spoke topologies and subinterfaces　

frame relay congestion control mechanisms　

frame relay traffic control　

frame relay/atm interworking　

atm　

ethernet over atm　

metro ethernet　

selecting routers for an enterprise wan design　

selecting a wan service provider　

example of a wan design　

background information for the wan design project　

business and technical goals　

network applications　

user communities　

data stores (servers)　

current network　

traffic characteristics of the existing wan　

wan design for klamath paper products　

summary　

review questions　

design scenario　

summary for part iii　

part iv　testing, optimizing, and documenting your networkdesign　

chapter 　testing your network design　

using industry tests　

building and testing a prototype network system　

determining the scope of a prototype system　

testing a prototype on a production network　

writing and implementing a test plan for your network design　

developing test objectives and acceptance criteria　

determining the types of tests to run　

documenting network equipment and other resources　

writing test scripts　

documenting the project timeline　

implementing the test plan　

tools for testing a network design　

types of tools　

examples of network testing tools　

ciscoworks internetwork performance monitor　

wandl network planning and analysis tools　

opnet technologies　

ixia tools　

netiq voice and video management solution　

netpredict’s netpredictor　

summary　

review questions　

design scenario　

chapter 　optimizing your network design　

optimizing bandwidth usage with ip multicast technologies　

ip multicast addressing　

internet group management protocol　

multicast routing protocols　

distance vector multicast routing protocol　

protocol independent multicast　

reducing serialization delay　

link-layer fragmentation and interleaving　

compressed real-time transport protocol　

optimizing network performance to meet quality of service

requirements　

ip precedence and type of service　

ip differentiated services field　

resource reservation protocol　

common open policy service protocol　

classifying lan traffic　

cisco ios features for optimizing network performance　

switching techniques　

classic methods for layer packet switching　

netflow switching　

cisco express forwarding　

queuing services　

first-in, first-out queuing　

priority queuing　

custom queuing　

weighted fair queuing　

class-based weighted fair queuing　

low-latency queuing　

random early detection　

weighted random early detection　

traffic shaping　

committed access rate　

summary　

review questions　

design scenario　

chapter 　documenting your network design　

responding to a customer’s request for proposal　

contents of a network design document　

executive summary　

project goal　

project scope　

design requirements　

business goals　

technical goals　

user communities and data stores　

network applications　

current state of the network　

logical design　

physical design　

results of network design testing　

implementation plan　

project schedule　

project budget　

return on investment　

design document appendix　

summary　

review questions　

design scenario　

glossary　

index