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網(wǎng)站建設(shè)包含哪些方面刷關(guān)鍵詞排名軟件有用嗎

news 2025/7/4 18:07:02

網(wǎng)站建設(shè)包含哪些方面,刷關(guān)鍵詞排名軟件有用嗎,網(wǎng)站建設(shè)公司新報(bào)價(jià),新聞網(wǎng)站開發(fā)的意義DHCP工作流程（一般情況下） 例二（無憂/22） 下圖為DHCP客戶機(jī)獲取IP地址等配置信息時(shí)，使用Wareshark軟件捕獲報(bào)文中編號(hào)為2?5的4條報(bào)文，圖中對(duì)編號(hào)為3的報(bào)文進(jìn)行了解析。分析圖中的信息并補(bǔ)全圖中①?⑤處的…

DHCP工作流程（一般情況下）

例二（無憂/22）

下圖為DHCP客戶機(jī)獲取IP地址等配置信息時(shí)，使用Wareshark軟件捕獲報(bào)文中編號(hào)為2?5的4條報(bào)文，圖中對(duì)編號(hào)為3的報(bào)文進(jìn)行了解析。分析圖中的信息并補(bǔ)全圖中①?⑤處的信息

[1]192.168.1.36

[2]255.255.255.255

[3]offer

[]

pconfig/all用于獲取參數(shù)的信息

DHCP工作流程（續(xù)約：執(zhí)行ipconfig/renew）

例一

某公司網(wǎng)絡(luò)DHCP服務(wù)器地址為192.168.0.2，可分配IP地址為192.168.0.6-192.168.0.254，缺省網(wǎng)關(guān)的地址為192.168.0.1，DNS服務(wù)器地址為192.168.0.2。網(wǎng)絡(luò)中某客戶機(jī)從服務(wù)器獲取IP地址后，在客戶機(jī)上執(zhí)行ping命令的過程中，連續(xù)捕獲的4條報(bào)文及對(duì)第4條報(bào)文的部分解析如下圖所示。請(qǐng)補(bǔ)全圖中空白處的信息。

編號(hào)	源IP地址	目的IP地址	報(bào)文摘要
1	192.168.0.10	192.168.0.1	Ping:Request
2	?[1]	?[2]	Ping:Reply
3	192.168.0.10	?[3]	DHCP:Request, Type: Request
4	?[4]	192.168.0.10	DHCP:Reply, Type:Ack
DHCP:----- DHCP Header ----- DHCP: Boot record type????????? = 2 (Reply) DHCP: Hardware address type??? = 1 (10M Ethernet) DHCP: Hardware address length? = 6 bytes DHCP: Client self-assigned address?????? =[192.168.0.10] DHCP: Client address???????????????????? = [192.168.0.10] DHCP: Next Server to use? in bootstrap? = [0.0.0.0] DHCP: Relay Agent?????????????????????? = [0.0.0.0] DHCP: Client hardware address?????????? = 001122334455 DHCP: VendorInformation tag? = 63825363 DHCP: MessageType??????????? = 5 DHCP: Address renewel interval???????? = 345600 (seconds) DHCP: Address rebinding interval?????? = 604800 (seconds) DHCP: Request IP Address lease time?? =? 691200 (seconds) DHCP: Subnet mask? = 255.255.255.0 DHCP: Gateway address??????????????? = [ [5]] DHCP: Domain Name Server address?? = [192.168.0.2]

[1]192.168.0.1

[2]192.168.0.10

[3]192.168.0.2

[4]192.168.0.2

[5]192.168.0.1

?DHCP（釋放后重獲地址ipconfig/relesse和ipconfig/renew）

例一

（無憂/23）下圖是在DHCP客戶機(jī)上依次執(zhí)行命令ipconfig /release和ipconfig /renew過程中，使用Wareshark軟件捕獲報(bào)文中的2條報(bào)文:圖中對(duì)第2條報(bào)文進(jìn)行了解析。

1.分析圖中的信息并補(bǔ)全圖中①?⑤處的信息

[1][2]

我們可以觀察到，這兩幅圖片“DHCP Discover”是一樣的，【1】空指的是發(fā)送報(bào)文的ip，【2】空指的是接收?qǐng)?bào)文的地址，正好對(duì)應(yīng)【1】0.0.0.0 【2】255.255.255.255

[3]

[4]

Client MAC adress 指的是客戶機(jī)的物理地址

通過這個(gè)圖我們可以看出來客戶機(jī)的ip地址192.168.1.1

[5]

例二

如下圖所示，在某DHCP客戶機(jī)上捕獲了6個(gè)報(bào)文，并對(duì)第5條報(bào)文進(jìn)行了解析。

編號(hào)		源IP地址			目的IP地址		報(bào)文摘要		報(bào)文捕獲時(shí)間
1		192.168.0.1			192.168.0.36		DHCP:Request, Type:DHCP release		09:06:55
2		0.0.0.0			255.255.255.255		DHCP:Request, Type:DHCP discover		09:07:00
	3		192.168.0.36			255.255.255.255		DHCP:Reply, Type:DHCP offer		09:07:00
	4		0.0.0.0			255.255.255.255		DHCP:Request, Type:DHCP request		09:07:00
	5		192.168.0.36			255.255.255.255		DHCP:Reply,? Type:DHCP ack		09:07:00
	6		192.168.0.1			192.168.0.47		WINS:? C ID=33026? op=register name=xp		09:07:03
				? DHCP: ----- DHCP Header ----- DHCP: Boot record type????????? = 2 (Reply) DHCP: Hardware address? type??? = 1 (10M Ethernet) DHCP: Hardware address length?? = 6 bytes DHCP: DHCP: Hops????????????????????? = 0 DHCP: Transaction id???????????? = 2219131D DHCP: Elapsed boot time???????? = 0 seconds DHCP: Flags????????????????????? = 0000 DHCP: 0????????????????????????? =? no broadcast DHCP: Client self-assigned? address?????? = [0.0.0.0] DHCP: Client address???????????????????? = [192.168.0.1] DHCP: Next Server to use? in bootstrap? = [0.0.0.0] DHCP: Relay Agent?????????????????????? = [0.0.0.0] DHCP: Client hardware? address?????????? = 001122334455 DHCP: DHCP: Host name???????? = "" DHCP: Boot file name???? =? "" DHCP: DHCP:? Vendor Information tag? = 63825363 DHCP:? Message Type??????????? = 5 (DHCP Ack) DHCP: Address renewel? interval???????? =? 345600 (seconds) DHCP: Address rebinding? interval?????? =? 604800 (seconds) DHCP: Request IP Address? lease time?? = 691200 (seconds) DHCP: Subnet mask? = 255.255.255.0 DHCP: Gateway address??????????????? = [192.168.0.100]???????? DHCP: Domain Name Server? address?? = [202.106.0.20]

分析圖中信息并回答下列問題。

（1）該客戶機(jī)獲取的IP地址是 [198.168.0.1]

我們可以觀察到“Type:DHCP release”就因該明白對(duì)應(yīng)的是第一個(gè)步驟左邊的就是客戶端地址。

（2）在DHCP服務(wù)器中設(shè)置的DNS服務(wù)器地址是 [202.106.0.20]，設(shè)置的路由器地址是 [192.168.0.100]。

“Domain Name Server”的縮寫就是DSN（域名服務(wù)器地址，DNS服務(wù)器的ip地址）；“Gateway address ”就是網(wǎng)關(guān)地址，缺省路由（客戶機(jī)直連的路由器）的ip地址。

（3）若該客戶機(jī)由DHCP服務(wù)器分配固定的IP地址，則在新建保留時(shí)，需輸入的MAC地址是 [001122334455]。

“Client hardware? address”?指的就是客戶機(jī)的物理地址（MAC地址）

（4）DHCP服務(wù)器的IP地址是 [192.168.0.36]。

我們可以觀察到“Type:DHCP release”就因該明白對(duì)應(yīng)的是第一個(gè)步驟左邊的就是DHCP服務(wù)器的IP地址。

例三{無憂/4}

某公司網(wǎng)絡(luò)DHCP服務(wù)器地址為192.168.0.2，可分配IP地址為192.168.0.6-192.168.0.254，缺省網(wǎng)關(guān)的地址為192.168.0.1。網(wǎng)絡(luò)中某客戶機(jī)從服務(wù)器獲取IP地址后，在客戶機(jī)上執(zhí)行ping? www.bupt.edu.cn命令的過程中，連續(xù)捕獲的5條報(bào)文及對(duì)第5條報(bào)文的部分解析如下圖所示。請(qǐng)補(bǔ)全圖中空白處的信息。

編號(hào)		源IP地址		目的IP地址		報(bào)文摘要
1		192.168.0.6		192.168.0.3		Dns:Query
	2		?[1]		?[2]		Dns:Response
	3		192.168.0.6		114.255.40.66		Ping:Request
	4		192.168.0.6		192.168.0.2		DHCP:Request,? Type: Request
	5		?[3]		?[4]		DHCP:Reply, Type:Ack
DHCP:? ----- DHCP Header ----- DHCP: Boot record type????????? = 2 (Reply) DHCP: Hardware address type??? = 1? (10M Ethernet) DHCP: Hardware address length? = 6 bytes DHCP: Client self-assigned address?????? =? [192.168.0.6] DHCP: Client address???????????????????? = [192.168.0.6] DHCP: Next Server to use? in bootstrap? = [0.0.0.0] DHCP: Relay Agent?????????????????????? = [0.0.0.0] DHCP: Client hardware address?????????? = 001122334455 DHCP: Vendor? Information tag? = 63825363 DHCP: Message? Type??????????? = 5 DHCP: Address renewel interval???????? =? 345600 (seconds) DHCP: Address rebinding interval?????? = 604800 (seconds) DHCP: Request IP Address lease time?? =? 691200 (seconds) DHCP: Subnet mask? = 255.255.255.0 DHCP: Gateway address??????????????? = [192.168.0.1] DHCP: Domain Name Server address?? = [ [5]]?

[1]192.168.0.3

[2]192.168.0.6

[3]192.168.0.2

[4]192.168.0.6

[5]192.168.0.3為啥

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