2
3
4
5
6
7
8
9
10
習題七
【問題1】訪問列表可以幫助我們控制網(wǎng)上IP包的傳輸，其主要應(yīng)用在哪幾個方面？
【問題2】標準的IP訪問列表和擴展的IP訪問列表主要區(qū)別是什么？
【問題3】下面是一臺使用了標準訪問列表的路由器的部分配置，請指出其中的錯誤并闡述原因。
access-list 1 deny 172.16.4.13 0.0.0.0
interface serial 0
ip access-group 1 out
習題八
我們在日常工作中通常使用show interface [端口及端口號] 來查看端口的運行狀態(tài)。
下面的例子是我們在不同情況下看到的端口狀態(tài)行的內(nèi)容，請分析其產(chǎn)生的原因及解決方法。
1、
Router#show interface serial 0
Serial0 is up, line protocol is up
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of show interface counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
2、
Router#show interface serial 0
Serial0 is down, line protocol is down
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of show interface counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
3、
Router#show interface serial 0
Serial0 is up, line protocol is down
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of show interface counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
4、
Router#show interface serial 0
Serial0 is administratively down, line protocol is down
Hardware is HD64570
MTU 1500 bytes, BW 1544 Kbit, DLY 1000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of show interface counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
- 推薦給朋友
- 收藏此頁
·網(wǎng)絡(luò)工程師資料：網(wǎng)絡(luò)體系結(jié)構(gòu)-軟考網(wǎng)絡(luò)類題解 (2008-4-25 14:33:38)
·計算機網(wǎng)絡(luò)基礎(chǔ)網(wǎng)絡(luò)拓撲結(jié)構(gòu)及優(yōu)缺點分析 (2008-2-22 14:04:32)
·網(wǎng)絡(luò)工程師必知：靜態(tài)路由協(xié)議配置方法 (2008-2-22 14:03:39)
·計算機網(wǎng)絡(luò)尼奎斯特 香農(nóng)公式例題解析 (2008-2-22 14:02:35)
·軟考復(fù)習：因特網(wǎng)IP的分類、尋址規(guī)則及子網(wǎng)掩碼 (2008-2-22 13:57:21)
網(wǎng)友評論如果軟件水平考試網(wǎng)所轉(zhuǎn)載內(nèi)容不慎侵犯了您的權(quán)益，請與我們聯(lián)系
，我們將會及時處理。如轉(zhuǎn)載本軟件水平考試網(wǎng)內(nèi)容，請注明出處。
