1.计算机网络体系结构

1.1计算机网络概述

7,12,13

1.

image-20251024202832039

image-20251024203205157

2.

image-20251024203021111

image-20251024203031593

image-20251024203411745

3.

image-20251024203053264

image-20251024203823612

真题

image-20251024205041042

image-20251024205052020

image-20251024205201993

image-20251024205213805

image-20251024205225700

可以不参考答案。

15:分组传播可以相当于一个流水线,相当于一条已经连接好的电路交换(总传输文件大小的发送时延)+一个分组的发送时延(或多个,取决于路由器的多少)(不考虑传播时延)。

报文交换相当于不太聪明的流水线,需要等文件在完整到达一个路由器之后,再进行传输。

image-20251024205702754

14:可计算出总的发送时延为80ms,最短路径上有两个路由器,需要加上2个分组的发送时延0.16ms

16:不考虑路由器,两段单向传播时延为0.02ms,文件的总发射时延为80ms,加上1个分组的发送时延0.08ms

1.2计算机网络体系结构和参考模型

10,12,18,20,22,23,27,37

1.

image-20251024210633247

A

2.

image-20251024211209890

D

3.

image-20251024211230266

得记住:

image-20251024211455753

4.

image-20251024211248677

image-20251024211556539

5.

image-20251024211305095

image-20251024211634924

6.

image-20251024211318225

image-20251024211711469

image-20251024211721700

7.

image-20251024211338230

image-20251024211942144

8.

image-20251024211405199

image-20251024212030476

2.物理层

2.1通信基础

4,5,7,10,12,13,14,15,18,21,27

1.

image-20251024225520935

image-20251026142045467

2.

image-20251026122936456

image-20251026142114394

3.

image-20251026122951544

image-20251026123003867

image-20251026142152263

4.

image-20251026123026194

image-20251026142325903

5.

image-20251026123057234

image-20251026142518819

6.

image-20251026123112625

image-20251026142717359

7.

image-20251026123126426

A

image-20251026142817519

8.

image-20251026123140706

image-20251026142850632

9.

image-20251026123152045

image-20251026143042751

10.

image-20251026123209595

image-20251026143112810

11.

image-20251026123222016

image-20251026143150134

真题

image-20251026143710630

image-20251026143731865

image-20251026143952579

image-20251026144013610

2.2传输介质

3,6,10,12

1.

image-20251026144132103

image-20251026144756168

2.

image-20251026144158558

image-20251026144832435

3.

image-20251026144259750

image-20251026144931818

4.

image-20251026144421259

image-20251026144951914

2.3物理层设备

4

image-20251026145738529

image-20251026145753461

3.数据链路层

3.1数据链路层的功能

3,4

1.

image-20251026150911946

image-20251026150946607

2.

image-20251026150925222

Dimage-20251026151008920

3.2组帧

真题1

image-20251026151140249

image-20251026151201148

image-20251026151226248

3.3差错控制

3

image-20251026163438662

1.

image-20251026163323707

image-20251026163528105

2.

image-20251026163749353

image-20251026163336069

image-20251026163713387

7的答案有问题

3.

image-20251026165548360

image-20251026165604666

3.4流量控制和可靠传输机制

5,9,10,11,13,19,21,23,25,29,30

1.

image-20251027221900891

image-20251028093934005

2.

image-20251027221917272

image-20251027221927944

image-20251028094101042

3.

image-20251027221956059

image-20251028094131142

4.

image-20251027222011773

image-20251028094213603

5.

image-20251027222029325

image-20251028095116178

6.

image-20251027222052631

image-20251028100335488

7.

image-20251027222102029

image-20251027222114975

image-20251028100425194

8.

image-20251027222130659

image-20251028100452109

9.

image-20251027222146698

image-20251028100827456

10.

image-20251027222205993

image-20251028101008189

11.

image-20251027222216852

image-20251028101043611

P.S.单位转化成数据量而非时间可以简化运算

真题:

image-20251028102048926

image-20251028102101393

image-20251028102025481

3.5介质访问控制

4,11,13,15,17,19,21,27,29,30,35,38,41,42

1.

image-20251028102140334

image-20251028144512593

2.

image-20251028102202834

image-20251028144542327

3.

image-20251028102218455

image-20251028144632191

4.

image-20251028102248251

image-20251028144705489

5.

image-20251028102302496

image-20251028144914284

image-20251028144926122

6.

image-20251028102316871

image-20251028144939702

7.

image-20251028102335985

image-20251028145024509

8.

image-20251028102350697

image-20251028145117842

9.

image-20251028102404850

image-20251028102416495

image-20251028145206773

10.

image-20251028102430653

image-20251028145819633

11.

image-20251028102509538

image-20251028145807766

12.

image-20251028102525936

image-20251028145929477

13.

image-20251028102556268

image-20251028150119835

14.

image-20251028102608352

image-20251028150541953

image-20251028150554360

15.

image-20251028102632083

image-20251028150618918

IMG_20251028_151308

真题:

image-20251028151819729

D

image-20251028151904271

B

image-20251028151841465

B

image-20251028151931956

D

3.6局域网

1,6,7,9,10,11,14,15,18,19,22,23,26

1.

image-20251028152635447

image-20251028153138608

2.

image-20251028152713394

image-20251028154541753

3.

image-20251028152730664

B

4.

image-20251028152741395

image-20251028160701862

5.

image-20251028152759287

image-20251028160843068

6.

image-20251028152809025

image-20251028161050674

7.

image-20251028152827744

A

8.

image-20251028152923202

image-20251028161124469

9.

image-20251028152936667

image-20251028161148286

10.

image-20251028152949271

image-20251028161252684

11.

image-20251028153003301

C

12.

image-20251028153014485

image-20251028161656961

13.

image-20251028153043390

A

image-20251028161715368

image-20251028161724557

14.

image-20251028153059811

image-20251028162110377

15.

image-20251028162151073

image-20251028162138089

3.7广域网(忽略)

3,6,7,8

1.

image-20251028162354582

image-20251028162458223

2.

image-20251028162405269

image-20251028162508452

3.

image-20251028162418913

image-20251028162521330

4.

image-20251028162437259

image-20251028162540859

3.8数据链路层设备

1,2,3,11,18,21

1.

image-20251028162755615

image-20251028163008872

2.

image-20251028162808070

image-20251028163032156

3.

image-20251028162826448

image-20251028163234497

image-20251028163244919

4.

image-20251028162845213

image-20251028162855174

image-20251028163341750

5.

image-20251028162918992

image-20251028163458974

6.

image-20251028162949334

image-20251028163648966

4.网络层

4.1网络层的功能

5,9,13,18,19,21

1.

image-20251030232212427

image-20251102152404964

2.

image-20251030232242174

image-20251102152447679

3.

image-20251030232255017

image-20251102152536729

4.

image-20251030232309187

image-20251030232320120

image-20251102152710142

5.

image-20251030232337065

image-20251102152735419

6.

image-20251030232356840

image-20251102152820496

真题:

image-20251102152931053

image-20251102152943745

4.2IPV4

1,2,4,10,11,12,15,17,18,19,21,22,23,24,27,29,34,35,36,38,40,45,46,48,50,60,62,64,65,66,67,69,70

1.

image-20251030232548084

image-20251102153027841

2.

image-20251030232601301

image-20251102153144043

3.

image-20251030232611873

image-20251102153420195

4.

image-20251030232625358

B(答案是B,但A似乎也不对)

image-20251102153557566

5.

image-20251030232636620

image-20251102154016053

6.

image-20251030232720686

image-20251102154143761

7.

image-20251030232734316

image-20251102154243440

D类多播地址,阴的没边

8.

image-20251030232748142

image-20251102154405618

9.

image-20251030232757492

image-20251102154511864

10.

image-20251030232806292

image-20251102154604436

11.

image-20251030232829751

image-20251102154634301

12.

image-20251030232842340

image-20251102154750346

13.

image-20251030232851967

image-20251102154816402

14.

image-20251030232901351

image-20251102154853710

15.

image-20251030232915363

image-20251102154934888

16.

image-20251030232925804

阴的一蹋糊涂

image-20251102155037102

image-20251102155050133

17.

image-20251030232940006

image-20251102155311204

18.

image-20251030232950213

image-20251102155653220

19.

image-20251030233002425

image-20251102155723018

image-20251102155742338

20.

image-20251030233023204

image-20251102160419997

21.

image-20251030233033215

image-20251102160712342

有点难

22.

image-20251030233053772

image-20251102164958792

23.

image-20251030233116341

image-20251102170907556

24.

image-20251030233127036

image-20251102170924439

25.

image-20251030233137624

image-20251102171011222

26.

image-20251102171045135

image-20251030233158436

image-20251102171129270

image-20251102171140957

27.

image-20251030233211905

image-20251102171733995

28.

image-20251030233222940

image-20251030233236200

image-20251102173220981

29.

image-20251030233254176

image-20251102173351619

image-20251102173404073

30.

image-20251030233305186

image-20251102173844967

31.

image-20251030233315981

image-20251102174100337

32.

image-20251030233343264

image-20251102174344780

33.

image-20251030233359143

A

image-20251102174454110

真题:

image-20251102214012919

image-20251102214033931

image-20251102214558478

image-20251102214811871

image-20251102214833656

image-20251102214856792

4.3IPV6

6

1.

image-20251103223835998

image-20251103231534037

真题:

image-20251103223917410

image-20251103231600853

4.4路由算法和路由协议

15,18,21,22,23,24,25

1.

image-20251103224110466

image-20251103231620052

2.

image-20251103224136488

image-20251103231706074

3.

image-20251103224910332

image-20251103231808038

4.

image-20251103224922105

image-20251104131524291

5.

image-20251103224934253

image-20251103224943125

image-20251104131810720

6.

image-20251103225000900

image-20251104131850929

7.

image-20251103225115374

image-20251104132016485

真题:

image-20251103225156161

image-20251103225206823

image-20251104132357608

4.5IP多播

2

image-20251103225313499

image-20251103225322939

image-20251104132438806

4.6移动IP

3

image-20251103225414860

D

4.7网络层设备

1,7,10,15,16,18,21

1.

image-20251103225453636

image-20251104140236486

2.

image-20251103225506756

image-20251104140811059

3.

image-20251103225524853

image-20251104141339169

4.

image-20251103225555199

image-20251104141358717

5.

image-20251103225613337

D

6.

image-20251103225623140

image-20251103225639457

image-20251104141511989

7.

image-20251103225654194

image-20251104141633459

5.传输层

5.1传输层提供的服务

8

image-20251111211857876

image-20251111211916642

5.2UDP

3,8,11,12

1.

image-20251111211954186

image-20251111212004741

image-20251111212252639

2.

image-20251111212038980

image-20251111212236301

3.

image-20251111212104649

image-20251111212323308

4.

image-20251111212125638

image-20251111212608792

5.3TCP

9,10,13,14,15,16,22,23,26,27,31,32,33,34,39,44,49,60

1.

image-20251111212727114

image-20251111213347715

2.

image-20251111212826781

image-20251111213550438

image-20251111213601848

3.

image-20251111212917158

image-20251111212933897

image-20251111213638968

4.

image-20251111212945697

image-20251111213717753

5.

image-20251111213001518

image-20251111215020664

6.

image-20251111213016042

image-20251111215035913

7.

image-20251111213034238

image-20251111215117883

image-20251111215128516

或者985-211-2=772

8.

image-20251111213043437

image-20251111215243261

9.

image-20251111213100456

C

image-20251111215405252

10.

image-20251111213110151

image-20251111215458800

11.

image-20251111213125399

image-20251111215603347

12.

image-20251111213133060

image-20251111215644030

image-20251111215654694

13.

image-20251111213142734

image-20251111215747057

14.

image-20251111213157068

image-20251111213209437

image-20251111215933361

15.

image-20251111213226054

image-20251111220032834

16.

image-20251111213247293

image-20251111220115056

17.

image-20251111213301703

image-20251111220324497

18.

image-20251111213314849

image-20251111220609466

真题:

image-20251111222230650

image-20251111222243304

image-20251111222257113

image-20251111222309578

image-20251111222331557

image-20251111222340705

image-20251111222354784

image-20251111222417400

image-20251111222452988

image-20251111222507498

image-20251111222526120

image-20251111222536783

6.应用层

6.1网络应用模型

6.2域名系统

6,11,12,14

1.

image-20251111223229979

image-20251111223551618

2.

image-20251111223255924

image-20251111223618979

3.

image-20251111223316007

image-20251111223358278

image-20251111223638881

4.

image-20251111223423613

image-20251111223718554

image-20251111223730103

6.3文件传输协议

9,10,12,13

1.

image-20251111224030030

image-20251111224306968

2.

image-20251111224041535

image-20251111224101161

image-20251111224325139

3.

image-20251111224138140

image-20251111224349602

image-20251111224430027

4.

image-20251111224155631

image-20251111224441683

真题:

image-20251111224232442

image-20251111224456985

6.4电子邮件

8,11

1.

image-20251111224541069

image-20251111224725896

2.

image-20251111224600911

image-20251111224820919

真题:

image-20251111224701606

D

6.5万维网

1,7,11,12,13,14,15,17,18

1.

image-20251111224912790

C

2.

image-20251111224934513

image-20251111230327457

3.

image-20251111224950604

image-20251111230410695

4.

image-20251111225001154

image-20251111230536319

5.

image-20251111225013866

image-20251111225023685

image-20251111230836030

6.

image-20251111225036466

image-20251111231143692

7.

image-20251111225050518

image-20251111231413969

8.

image-20251111225107491

image-20251111231515879

9.

image-20251111225118163

image-20251111231642438

image-20251111231700880

真题:

image-20251111231805019

image-20251111231748963