packet header 中文意思是什麼
packet header
解釋
包報頭-
The basic thought of the csapfba algorithm is : the edge routers perform the state management per flow, and the edge routers differentiate between the marked flows and the non - marked flows, and the edge routers insert the relevant information into the packet header by using dynamic packet state ; the core routers divide the output link bandwidth into two parts in the light of the state information of the packet header by using class - based queueing, and the core routers allocate proportionally the bandwidth to the marked flows according to their service profiles and the current network load, and the core routers allocate the bandwidth to the non - marked flows according to the principle of max - min fairness, and the csapfba algorithm can adaptively dynamically adjust the bandwidth allocation between the marked flows and the non - marked flows
本文在csfq演算法的基礎上，提出了一種核心無狀態的自適應的成比例公平帶寬分配csapfba （ core - statelessadaptiveproportionalfairbandwidthallocation ）演算法。 csapfba演算法的基本思想是：在邊界路由器完成基於每個流的狀態處理，將所有的流分成標記流和非標記流兩種類型，採用dps技術將有關信息編碼進分組頭；在核心路由器根據分組頭中攜帶的狀態信息採用cbq策略，將輸出鏈路帶寬分成兩部分，對標記流根據當前的網路負荷按照服務規格成比例地分配帶寬，對非標記流按照最大最小公平性原則分配帶寬，並且能自適應地動態調整帶寬分配的比例。 -
It includes chip selection, schematic circuit design, cpu selection and configuration, startup of the system, selection and configuration of embedded operation system, selection and configuration of tcp / ip software. it also describes some driver programming techniques of network controller. part 3 ( chapter 5 and 6 ) briefly introduces encryption technology and the ipsec protocol system, including architecture, mode, security association, security policy, implementation mode, processing of in / out packet, esp ( encapsulation security payload ), ah ( authentication header ), ike ( internet key exchange ) etc. the security requirements of embedded - networking is also analyzed
本文首先探討了嵌入式網路的原理和設計要求，接著介紹了本文所開發的嵌入式系統的硬體平臺的設計（包括處理器的選擇與配置、存儲器的選擇和io設備的選用等） ，系統的啟動（包括bios和dos的啟動以及嵌入式操作系統vrtx的配置和引導） ，網路及其安全服務的實現（包括嵌入式協議棧usnet的選取、底層驅動程序的設計和安全協議ipsec的分析與實施） 。 -
The ability of keeping the ip packet ' s integrity, secrecy, authentication, data origination, anti - relay is discussed. the relationship of ipsec component authentication header ( ah ), encapsulating security payload ( esp ) and ike ( internet key exchange ) is also talked about. this discussion of ipsec makes the impression that ipsec make ip layer security enough
論述了ipsec在ip報文的完整性、機密性、數據來源認證和抗重播等方面的能力， ipsec的基本協議? ?認證報文頭（ ah ）和安全封裝載荷報頭（ esp ）與ipsec安全體系的其它組成部分如安全策略、加密和認證演算法、密鑰管理等如何合作，共同完成對ip報文的安全保護。 -
In its header, each packet also carries the ip address of the final destination
在報頭中，每個包也攜帶最終目的地的ip地址。 -
When ddos happens, the flood presents some characteristics, such as the statistical distributing. although an attacker can forge any field in the ip header, he or she cannot falsify the numbers of hops an ip packet takes the reach its destination, which is solely determined by the internet routing infrastructure
Tcpsynflood攻擊發生時，在路由器會引起某些異常情況，如流量異常（可能會流量猛增） ，報文流一些特徵的統計分佈特性發生改變（如源ip地址的隨機分佈特性， ttl欄位的分佈特性）等。 -
When a packet reaches the firewall, the kernel first examines the header information of the packet, particularly the destination of the packet
當信息包到達防火墻時，內核先檢查信息包的頭信息，尤其是信息包的目的地。 -
Students should be able to identify and describe the basic function of each component of a packet : header, data and trailer
1學生應能辨識及描述數據包各部件，包括表頭、數據及表尾的基本功能。 -
Basing on the study of the current routing algorithm, it proposes a new sd - anycast routing protocol algorithm. according to the character of this protocol, it implements this new protocol by adding additional packet header, routing maintaining and node dealing modules. lastly, according to creating prototype system and designing four comparing experiments, it gets the experiment statistical data, and makes a conclusion that this routing protocol algorithm has a better performance on one way delay, output, load balance and etc
本文首先介紹了anycast服務的概念、特點以及研究現狀;在分析了路由協議的一些相關知識和當今anycast路由協議的研究現狀的基礎上，深入研究了當前的路由協議演算法，提出了一個sd - anycast協議演算法，並在網路模擬軟體ns2設計平臺中根據該協議的特點，通過設計數據包報頭、路由表維護和節點處理等功能模塊，實現了該協議演算法;最後通過建立原型系統並設計四個對比實驗，得出實驗統計數據，定量地測定了該路由協議演算法在單程路徑延遲、吞吐量和負載平衡等方面所具有的優越性。 -
Example 1 - 5. you can see the fields of an ip packet ' s header and the values contained in each field in this protocol analyzer display
填充欄位通過在選擇欄位後面添加0來補足32位，這樣保持了頭長度是32比特的倍數。圖1 - 5顯示了協議分析議捕獲的ip包頭的信息可以同圖1 - 2做一個比較。 -
Routing table searches require only a look at a short string of data in the initial part of the packet, the header that tells a packet where to go
搜尋路由表只須檢查封包最前面的一小段資料，藉此辨識封包的目的地。 -
As gateways and routers transmit packets through a network, they decrement the current time - to - live value found in the packet header
當網關和路由器通過網路傳輸數據包時，它們遞減數據包標頭中的當前生存時間（ ttl ）值。 -
The authentication header ensures that the packet has not been altered or tampered with during transmission
Ah確保包在傳輸中沒有被修改。 -
Functioning at the network layer of the open systems interconnection model, the packet - encryption device at the originating site encrypts the entire packet, including the ip header, and provides it with a new header
由於是在「開放系統互連」模型的網路層上起作用的，始發站上的包加密裝置對整個包加密，包括ip報頭，都提供一個擁有新報頭的包。 -
A series of basic functions are performed in the chapter 4, includes microengine initialization, packet receive processing, exception process, mac and ip header processing, ip forwarding, and packet transmit processing, etc. these functions build a basic data path for the whole system
第四章中實現一系列最基本的功能，包括微引擎初始化，包接收處理，異常處理， mac及ip頭部處理， ip轉發以及包發送處理等。這些功能為整個系統建立起一條基本的數據通路。 -
Pdcp module aims at saving wireless resources with compressing the redundant information in the packet header
Pdcp模塊的主要功能是利用數據包頭部的冗餘信息對其進行壓縮，以節約無線資源。 -
The icmp echo request failed because a node router or gateway encountered problems while processing the packet header
由於節點（路由器或網關）在處理數據包標頭時遇到問題， icmp回送請求失敗。 -
Every ip packet has a header that contains information defining where the packet is to go, and how its supposed to be processed see the next figure
） ，裏面含有該包的目的地、及如何處理等控制信息（參見下圖） 。
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