【導(dǎo)讀】當(dāng)今是信息時(shí)代，互聯(lián)網(wǎng)正在給全球帶來(lái)翻天覆地的變化。在全球的飛速發(fā)展，網(wǎng)絡(luò)技術(shù)的日益普及，網(wǎng)絡(luò)安全問(wèn)題也顯得越來(lái)越突出。破壞而造成的經(jīng)濟(jì)損失高達(dá)數(shù)百億美元。傳統(tǒng)的防火墻技術(shù)固然重要，但是，發(fā)。網(wǎng)絡(luò)攻擊，從而提供對(duì)內(nèi)部攻擊、外部攻擊和誤操作的實(shí)時(shí)保護(hù)。模塊完成了對(duì)共享網(wǎng)段中的數(shù)據(jù)包的捕獲和分析等功能。它是整個(gè)網(wǎng)絡(luò)入侵檢測(cè)。系統(tǒng)的重要組成部分，是響應(yīng)模塊設(shè)計(jì)的基礎(chǔ)，為響應(yīng)模塊提供需要的數(shù)據(jù)。

　　

【正文】 handsome flask w hich replaced the cheap one, and looked so earnest and humble in her little effort to fet herself that Meg hugged her on the spot, and Jo pronounced her `a trump39。, while Beth ran to the window, and picked her finest rose to ornament the stately bottle. You see I felt ashamed of my present, after reading and talking about being good this morning, so I ran round the corner and changed it the minute I was up, and I39。m so glad, for mine is the handsomest now. Another bang of the street door sent the basket under the sofa, and the girls to the table, eager for breakfast. Merry Christmas, Marmee! Many of them! Thank you for our books. We read some, and me an to every day, they all cried in chorus. Merry Christmas, little daughters! I39。m glad you began at once, and hope you will keep on. But I want to say one word before we sit down. Not far away from here lies a poor woman with a little newborn baby. Six children are huddled into one bed to keep from freezing, for they have no fire. There is nothing to eat over there, and the oldest boy came to tell me they were suffering hunger and cold. My girls, will you give them your breakfast as a Christmas present? They were all unusually hungry, having waited nearly an hour, and for a minute no one spoke, only a minute, for Jo exclaimed impetuously, I39。m so glad you came before we began! May I go and help carry the things to the poor little children? asked Beth eagerly. I shall take the cream and the muffings, added Amy, heroically giving up the article she most liked. Meg was already covering the buckwheats, and piling the bread into one big plate. I thought you39。d do it, said Mrs. March, smiling as if satisfied. You shall all go and help me, and when we e back we will have bread and milk for breakfast, and make it up at dinnertime. They were soon ready, and the procession set out. Fortunately it was early, and they went through back streets, so few people saw them, and no one laughed at the queer party. A poor, bare, miserable room it was, with broken windows, no fire, ragged bedclothes, a sick mother, wailing baby, and a group of pale, hungry children cuddled under one old quilt, trying to keep warm. How the big eyes stared and the blue lips smiled as the girls went in. Ach, mein Gott! It is good angels e to us! said the poor woman, crying for joy. Funny angels in hoods and mittens, said Jo, and set them to laughing. In a few minutes it really did seem as if kind spirits had been at wor k there. Hannah, who had carried wood, made a fire, and stopped up the broke n panes with old hats and her own cloa k. Mrs. March gave the mother tea and gruel, and forted her with promises of help, while she dressed the little baby as tenderly as if it had been her own. T he girls meantime spread the table, set the children round the fire, and fed them like so many hungry birds, laughing, talking, and trying to understand the funny broken English. Das ist gut! Die Engel kinder! cried the poor things as they ate and warmed their purple hands at the fortable blaze. T he girls had never been c alled angel children before, and thought it very agreeable, especially Jo, who had been considered a `Sancho39。 ever since she was born. That was a very happy breakfast, though they didn39。t ge t any of it. And when they went away, leaving fort behind, I think there were not in all the city four merrier people than the hungry little girls who gave away their breakfasts and contented themselves with bread and milk on Christmas morning. That39。s loving our neighbor better than ourselves, and I like it, said Meg, as they set out their presents while their mothe r was upstairs collecting clothes for the poor Hummels. Not a very splendid show, but there was a great deal of love done up inster an encouraging pat on the shoulder as they parted for the day, each going a different way, each hugging her little warm turnover, and each trying to be cheerful in spite of wintry weather, hard work, and the unsatisfied desires of pleasureloving youth. When Mr. March lost his property in trying to help an unfortunate friend, the two oldest girls begged to be allowed to do som ething toward their ow n support, at least. Believing that they could not begin too early to cultivate energy, industry, and independence, their parents consented, and both fell to work with the hearty good will which in spite of all obstacles is sure to succeed at last. Margaret found a place as nursery governess and felt rich with her small salary. As she said, she was `fond of luxury39。, and her chief trouble was poverty. She found it harder to bear than the others because she could remember a time when home was beautiful, life full of ease and pleasure, and want of any kind unknown. She tried not to be envious or discontented, but it was very natural that the young girl should long for pretty things, gay friends, acplishments, and a happy life. At the Kings39。 she daily saw all she wanted, for the children39。s older sisters were just out, and Meg caught frequent glimpses of dainty ball dresses and bouquets, heard lively gossip about theaters, concerts, sleighing parties, and merrymakings of all kinds, and saw money lavished on trifles which w ould have been so precious to her. Poor Meg seldom plained, but a sense of injustice made her feel bitter toward everyone sometimes, for she had not yet learned to know how rich she was in the blessings which alone can make life happy. Jo happened to suit Aunt March, who was lame and needed an active person to wait upon her. The childless old lady had offered to adopt one of the girls when the troubles came, and was much offended because her offer was declined. Other friends told the Marches that they had lost all chance of being remembered in the rich old lady39。s will, but the unworldly Marches only said... We can39。t give up our girls for a dozen fortun