【正文】 up certain associations when we put ourselves in such a scene. We are depressed by a dingy alley, not only because it is ugly, but because it may arouse a feeling, perhaps sometimes unconsciously, of poverty, misery, violence, viciousness, and the struggles of human beings who have to live under such conditions. A tropical jungle, for example, in Joseph Conrad’s Heart of Darkness, might involve a plicated analysis: the pleasure of the colours and forms of vegetation, the disfort of humidity, heat, and insects, a sense of mystery, horror, etc. The popularity of Sir Walter Scott’s “Waverley” novels is due in part to their evocation of a romantic mood of Scotland. The English novelist Graham Greene apparently needed to visit a fresh scene in order to write a fresh novel. His ability to encapsulate the essence of an exotic setting in a single book is exemplified in The Heart of the Matter。 she loved the place and was loved in the place. The vale, far from the madding crowd of the civilized city, was as serene and pure as the inhabitants. Tess, imbued deeply with the natural hue of the vale and bound closely to this world of simplicity and seclusion, experienced her own delight and happiness though her family was poor. It was, to some extent, her departure from her native place that led to her tragedy. In The Return of the Native, the atmosphere of Egdon Heath prevails over the whole book。Sometimes an environment serves as more than a mere place to set the story. Often, it is inextricably entangled with the protagonist, and even carries strong symbolic meanings. Cathy as an image of the feminine personality, for example, in Emily Bronte’s Wuthering Heights, is not supposed to possess the “wilderness” characteristic of masculinity and symbolized by the locales of Heathcliff and Wuthering Heights. In some fiction, setting is closely bound with theme. In The Scarlet Letter, even small details afford powerful hints at the theme of the story. At the start of the story, the narrator describes a colonial jailhouse: Apparently, the author makes a contrast between the ugly jailhouse with a tangled grassplot overgrown with burdock and pigweed and something as beautiful as a wild rose. As the story unfolds, he will further suggest that secret sin and a pretty child may go together like a pigweed and wild roses. In this artfully crafted novel, setting is intimately blended with characters, symbolism, and theme.Besides place and time, setting may also include the weather, which, indeed, may be crucial in some stories. When setting dominates, or when a piece of fiction is written largely to present the manners and customs of a locality, the writing is often called local color writing or regionalism and the writer, a regional writer.3. The setting of a novel is not always drawn from a reallife locale.…… 帶寬提升n 接入網(wǎng)提升用戶帶寬，3M左右/用戶。216。n 網(wǎng)絡(luò)和業(yè)務(wù)的可靠性。216。PIMSSM。216。n 用戶和業(yè)務(wù)安全控制：防非法使用、防攻擊。業(yè)務(wù)網(wǎng)絡(luò)時(shí)延上限延時(shí)抖動(dòng)上限丟包率上限包誤差率上限視頻直播1s1s1/10001/10000視頻點(diǎn)播10s1s1/10001/10000視頻會(huì)議400ms50ms1/10001/10000游戲200msN/AN/AN/A建議整體網(wǎng)絡(luò)拓?fù)鋱D如下：本工程建議在中心機(jī)房設(shè)置核心層設(shè)備S8508 1臺(tái)，配置雙個(gè)引擎，冗余交流電源模塊。配置匯聚層交換機(jī)12臺(tái)，其中4臺(tái)要求有12個(gè)千兆光口，選配S5624F其中4臺(tái)要求有4個(gè)千兆光口及48個(gè)10/100M電口，選配S3952另4臺(tái)要求有4個(gè)千兆光口及24個(gè)10/100M電口，選配S3928配置40個(gè)中距光模塊。 4 設(shè)備推薦及特性介紹 核心路由交換機(jī)S8508由于該網(wǎng)絡(luò)層次簡單,覆蓋地域較小,主要承載VOD點(diǎn)播等封閉流量. 所以需要網(wǎng)絡(luò)設(shè)備具備大容量快速轉(zhuǎn)發(fā)能力,S8500具有720G交換機(jī)能力,更適合該類需求。另外S8500支持MPLS 二層/三層VPN,可以很好的滿足大客戶業(yè)務(wù)的發(fā)展需求.。 S8500系列核心路由交換機(jī)提供大容量、高密度、模塊化體系架構(gòu)，提供二、三層線速轉(zhuǎn)發(fā)能力，具有強(qiáng)大的IP路由功能，同時(shí)支持分布式的IP/MPLS線速轉(zhuǎn)發(fā)、完善的QoS保障、有效的安全管理機(jī)制和電信級(jí)高可靠設(shè)計(jì)，滿足用戶對多業(yè)務(wù)、高可靠、大容量的需求，可廣泛應(yīng)用于IP城域網(wǎng)、大型園區(qū)網(wǎng)的交換核心和匯聚中心。、864Mpps包轉(zhuǎn)發(fā)能力，支持各種高密度業(yè)務(wù)板，整機(jī)可支持高達(dá)576個(gè)千兆端口、48個(gè)萬兆端口，滿足核心層設(shè)備大容量、高端口密度的要求，可以滿足用戶日益增長的帶寬需求，并能夠極大地保護(hù)和節(jié)約用戶投資。n 支持完善QinQ特性S8500支持靈活QinQ功能，可以根據(jù)內(nèi)層VLAN tag靈活標(biāo)記外層VLAN tag，滿足城域接入網(wǎng)一般建設(shè)需求。n 全面支持分布式MPLS VPN特性S8500遵循業(yè)務(wù)與性能并重的設(shè)計(jì)理念，實(shí)現(xiàn)MPLS的分布式線速轉(zhuǎn)發(fā)，支持MPLS L3 VPN、MPLS L2 VPN、VPLS等全面的業(yè)務(wù)功能，滿足高端用戶對新型增值業(yè)務(wù)的需求。n 完善的安全機(jī)制S8500支持OSPF 、RIP v2及BGP v4報(bào)文的明文及MD5密文認(rèn)證；，支持安全的SNMP v3網(wǎng)管協(xié)議、支持配置安全，對登錄用戶進(jìn)行認(rèn)證，不同級(jí)別的用戶有不同的配置權(quán)限，并提供兩種用戶認(rèn)證方式：本地認(rèn)證和RADIUS認(rèn)證。v2 Snooping支持MLD v1amp。系統(tǒng)采用華為公司創(chuàng)新的IRF（Intelligent Resilient Framework，智能彈性架構(gòu))技術(shù)，支持高達(dá)96G的堆疊帶寬和高密度千兆端口，支持萬兆上行。S5600系列以太網(wǎng)交換機(jī)包含型號(hào)如下：S5624P、S5624PPWR、S5648P、S5648PPWR 、S5624F。后面板提供兩個(gè)固定的堆疊接口和一個(gè)擴(kuò)展模塊插槽，擴(kuò)展模塊可選配8端口千兆SFP模塊、1端口萬兆模塊或2端口萬兆模塊。S5624F：采用交、直流雙輸入電源模塊供電。前面板提供24個(gè)千兆SFP接口和4個(gè)o的10/100/1000BaseT自協(xié)商以太網(wǎng)端口（RJ45連接器）產(chǎn)品特點(diǎn)n IRF智能彈性架構(gòu)技術(shù)S5600系列全千兆智能彈性交換機(jī)支持華為創(chuàng)新的IRF（Intelligent Resilient Framework）技術(shù)，能夠?qū)崿F(xiàn)用戶網(wǎng)絡(luò)的高度彈性智能擴(kuò)展。IRF（Intelligent Resilient Framework）技術(shù)包括三個(gè)方面：DDM、DRR和DLA。用戶可以通過CONSOLE、SNMP、TELNET、WEB等多種方式來管理整個(gè)Fabric。整個(gè)Fabric將作為一臺(tái)設(shè)備進(jìn)行路由功能和二三層轉(zhuǎn)發(fā)功能。3) DLA（分布鏈路聚合）：支持跨設(shè)備的鏈路聚合，可以在設(shè)備之間進(jìn)行鏈路的負(fù)載分擔(dān)和互為備份。作為供電方PSE（Power Sourcing Equipment）設(shè)備，（Powered Device）設(shè)備。通過支持POE和Voice VLAN技術(shù)，S5600系列交換機(jī)能夠提供完美的數(shù)據(jù)和語音融合解決方案。設(shè)備最大提供24/48端口10/100/1000M電接口、12個(gè)SFP千兆光接口或2個(gè)10G接口，充分滿足客戶對高密度GE和萬兆上行設(shè)備的需求。硬件支持二/三層線速交換，能夠識(shí)別、處理四到七層的應(yīng)用業(yè)務(wù)流，所有端口都具有單獨(dú)的數(shù)據(jù)包過濾、區(qū)分不同應(yīng)用流，并根據(jù)不同的流進(jìn)行不同的管理和控制。系統(tǒng)采用逐包轉(zhuǎn)發(fā)方式，保證了所有報(bào)文均獲得相同的轉(zhuǎn)發(fā)性能，對“紅碼病毒”和“沖擊波病毒”的攻擊具有天生的防御能力，有效保證了設(shè)備安全。在用戶接入網(wǎng)絡(luò)時(shí)完成必要的身份認(rèn)證，還可以通過靈活的MAC、IP、VLAN、PORT任意組合綁定，有效的防止非法用戶訪問網(wǎng)絡(luò)。支持用戶分級(jí)管理和口令保護(hù)，支持MAC地址學(xué)習(xí)數(shù)目限制、MAC地址與端口綁定、端口隔離、MAC地址黑洞；支持防止DoS攻擊功能。可以動(dòng)態(tài)的為通過認(rèn)證的用戶提供預(yù)先配置的一套QoS功能。支持SSH特性。n 高可靠性S5600系列交換機(jī)采用IRF技術(shù)組網(wǎng)后，能夠在整個(gè)堆疊組內(nèi)實(shí)現(xiàn)控制平面和數(shù)據(jù)平面所有信息的冗余備份，極大地增強(qiáng)了設(shè)備和網(wǎng)絡(luò)的可靠性，消除了單點(diǎn)故障，避免了業(yè)務(wù)中斷。 支持VRRP虛擬路由冗余協(xié)議，與其他三層交換機(jī)構(gòu)建VRRP備份組。支持在設(shè)備上配置多條等價(jià)路由的方式實(shí)現(xiàn)上行路由的冗余備份，當(dāng)主上行路由發(fā)生故障時(shí)自動(dòng)切換到下一條備份路由，實(shí)現(xiàn)上行路由的多級(jí)備份。n 豐富的QOS策略S5600系列交換機(jī)支持基于源MAC地址、目的MAC地址、源IP地址、目的IP地址、端口、協(xié)議的L2~L7復(fù)雜流分類；每端口支持100個(gè)流規(guī)則，整機(jī)支持3200/5600個(gè)流規(guī)則，充分保障了復(fù)雜網(wǎng)絡(luò)對于QoS規(guī)則的要求。支持CAR（Committed Access Rate）功能，可以實(shí)現(xiàn)基于端口和基于流的速率限制，限制的粒度可以精確至64Kbps，為網(wǎng)絡(luò)帶寬的精細(xì)化管理提供了手段。、iManager174。通過各種開放的標(biāo)準(zhǔn)MIB和擴(kuò)展MIB的支持可以提供完善的基于SNMP的第三方管理能力。2個(gè)高速堆疊端口，每端口48G堆疊帶寬，環(huán)形堆疊時(shí)可以提供高達(dá)96G堆疊帶寬。 S3900系列智能彈性以太網(wǎng)交換機(jī)（以下簡稱S3900）是華為公司為設(shè)計(jì)和構(gòu)建高彈性、高智能網(wǎng)絡(luò)需求而推出的新一代以太網(wǎng)交換機(jī)產(chǎn)品。S3900系列智能彈性交換機(jī)目前包含型號(hào)為：S3928PSI、S3928TPSI、S3928PEI、S3928FEI、S3928PPWREI、S3952PSI、S3952PEI、S3952PPWREI。增強(qiáng)型支持復(fù)雜的路由協(xié)議和豐富的業(yè)務(wù)特性，支持全部的IRF功能（分布設(shè)備管理、分布冗余路由和分布鏈路聚合）。S3900支持QinQ，可以將用戶私網(wǎng)VLAN標(biāo)簽封裝在公網(wǎng)VLAN標(biāo)簽中，使報(bào)文帶著 兩層VLAN Tag穿越運(yùn)營商的骨干網(wǎng)絡(luò)。n 高可靠性S3900不僅支持STP/RSTP/MSTP生成樹協(xié)議，還提供Smartlink技術(shù)，能實(shí)現(xiàn)主備鏈路毫秒級(jí)倒換，解決了電信級(jí)業(yè)務(wù)接入可靠性問