1. Suppose that you are a network engineer troubleshooting a problem at the physical layer. In doing this, you want to quickly access information about the latest industry standards.
The web sites of which organizations are most likely to provide this information?
ATM Forum
IETF
ITU-T
Microsoft
2. Suppose you are troubleshooting a problem at the data-link layer. You are at the stage of evaluating and documenting the changes you are making.
If you perform a set of problem-solving steps, which are completely unsuccessful, what should you do?
You evaluate and document the changes and the results of each change that you make
You should immediately undo any changes that you have made
You make initial hardware and software configuration changes
You verify that the changes you made actually fixed the problem without introducing any new problems
You verify that you have a valid saved configuration for any device on which you intend to modify the configuration
3. Suppose you are troubleshooting a problem at the data-link layer. You are at the stage of evaluating and documenting the changes you are making and realize that the problem is intermittent.
What should be the next step you perform?
You evaluate and document the changes and the results of each change that you make
You make initial hardware and software configuration changes
You need to wait to see if the problem occurs again before you can evaluate the effect of your changes
You verify that the changes you made actually fixed the problem without introducing any new problems
You verify that you have a valid saved configuration for any device on which you intend to modify the configuration
4. As a general approach when correcting an isolated problem at the physical or data-link layer, what is the first thing you should do?
You evaluate and document the changes and the results of each change that you make
You make initial hardware and software configuration changes
You verify that the changes you made actually fixed the problem without introducing any new problems
You verify that you have a valid saved configuration for any device on which you intend to modify the configuration
5. Which website would you most likely use to find the latest detailed technical documentation about the PPP protocol?
www.apple.com
www.ietf.org
www.linux.org
www.sniffers.com
星期一, 8月 03, 2009
星期日, 8月 02, 2009
Isolating problems occurring at layers 1 and 2
1. If you encounter a line protocol down message on a router interface, what is is an indication of?
The IGRP neighbour agencies are operational on that interface
The problem lies with another router
There is a problem with the interface at the data-link layer that prevents it from functioning properly
There is a problem with the interface at the physical layer that prevents it from functioning properly
2. A group of users reports that its connection to the network has gone down due to a problem in either the physical or data-link layer. You check the operational status, errors, and configuration of the affected interfaces. You still have not found the cause of the problem.
Which guideline for isolating a problem at the physical and data-link layers have you omitted?
Checking cable configuration
Disabling Spanning Tree
Verifying the IP address of the default gateway
Viewing TCP information on a host
3. While testing your FastEthernet 0/1 interface, you have noticed some packet loss. What command should you use to isolate this problem?
debug frame-relay lmi
show interface FastEthernet 0/1
show ip interface brief
show running-config interface
4. While working on the FastEthernet 0/1 interface, you realise that it is performing poorly under load. After running a diagnostic, you discover that there are a high number of late collisions recorded. What is this an indication of?
That the duplex configuration may be mismatched
That the interface has lost its connection to the device on the other end of the Ethernet cable
That the interface has restarted itself after an error condition
That there is a problem with the interface at the data-link layer
The IGRP neighbour agencies are operational on that interface
The problem lies with another router
There is a problem with the interface at the data-link layer that prevents it from functioning properly
There is a problem with the interface at the physical layer that prevents it from functioning properly
2. A group of users reports that its connection to the network has gone down due to a problem in either the physical or data-link layer. You check the operational status, errors, and configuration of the affected interfaces. You still have not found the cause of the problem.
Which guideline for isolating a problem at the physical and data-link layers have you omitted?
Checking cable configuration
Disabling Spanning Tree
Verifying the IP address of the default gateway
Viewing TCP information on a host
3. While testing your FastEthernet 0/1 interface, you have noticed some packet loss. What command should you use to isolate this problem?
debug frame-relay lmi
show interface FastEthernet 0/1
show ip interface brief
show running-config interface
4. While working on the FastEthernet 0/1 interface, you realise that it is performing poorly under load. After running a diagnostic, you discover that there are a high number of late collisions recorded. What is this an indication of?
That the duplex configuration may be mismatched
That the interface has lost its connection to the device on the other end of the Ethernet cable
That the interface has restarted itself after an error condition
That there is a problem with the interface at the data-link layer
星期六, 8月 01, 2009
Identifying symptoms of problems at layers 1 and 2
1. Which command output would you most likely see if you had a problem at the physical layer?
Ethernet 0/0 is down, line protocol is down
Invalid command, no available connection
Neighbor 172.10.160.2 (Serial 1/1) is down: holding time expired
Serial 1/0 is up, line protocol is administratively down
2. Identify the true statements regarding the symptoms of data-link layer problems.
Data-link optimization problems are arguably the least common
Framing errors appear
There are large quantities of broadcast traffic
The interface is down, and the line protocol is down
3. Which command output would you most likely see if you had a problem at the data link layer?
Ethernet 0/1 is down, line protocol is down
Interface Serial 1/0, changed state to up
Serial 0/1 is down, line protocol is down
Serial 0/1 is up, line protocol is down
4. You are a network engineer working on a network experiencing problems. You use the ping command to help you isolate the problems.
Identify the ping command output that would indicate the problems are at the data-link layer of the network.
address is 0007.8580.1581
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss)
Tracing route to 172.27.227.9
0 input errors, 0 CRC, 0 frame, 0 overrun
5. If you were investigating problems on the network at the physical layer, which of these would you be likely to see?
Abnormal LEDs
ARP errors
Excessive utilization
Increased buffer failures
6. What commands do you use to verify the ARP cache on a Windows end-system and the ARP table in a Cisco router?
arp -a
arp -s
show arp
show arp table
show arp ip
7. Identify the output from a traceroute that indicates the network is experiencing physical layer problems.
Excessive packet loss
Excessive runts
Increased buffer failures
Line coding errors
Ethernet 0/0 is down, line protocol is down
Invalid command, no available connection
Neighbor 172.10.160.2 (Serial 1/1) is down: holding time expired
Serial 1/0 is up, line protocol is administratively down
2. Identify the true statements regarding the symptoms of data-link layer problems.
Data-link optimization problems are arguably the least common
Framing errors appear
There are large quantities of broadcast traffic
The interface is down, and the line protocol is down
3. Which command output would you most likely see if you had a problem at the data link layer?
Ethernet 0/1 is down, line protocol is down
Interface Serial 1/0, changed state to up
Serial 0/1 is down, line protocol is down
Serial 0/1 is up, line protocol is down
4. You are a network engineer working on a network experiencing problems. You use the ping command to help you isolate the problems.
Identify the ping command output that would indicate the problems are at the data-link layer of the network.
address is 0007.8580.1581
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss)
Tracing route to 172.27.227.9
0 input errors, 0 CRC, 0 frame, 0 overrun
5. If you were investigating problems on the network at the physical layer, which of these would you be likely to see?
Abnormal LEDs
ARP errors
Excessive utilization
Increased buffer failures
6. What commands do you use to verify the ARP cache on a Windows end-system and the ARP table in a Cisco router?
arp -a
arp -s
show arp
show arp table
show arp ip
7. Identify the output from a traceroute that indicates the network is experiencing physical layer problems.
Excessive packet loss
Excessive runts
Increased buffer failures
Line coding errors
星期一, 7月 27, 2009
Facebook已同意廣告商運用你既相片
請注意!
Facebook已同意第三者廣告商任意運用你地係Facebook入面0既相片,
"請Click Settings入面0既Privacy Settings,
再選擇News Feeds & Wall, 選擇Facebook Ads果頁,
係drop down box選擇No One再Save changes."
咁就可以避免你0既相係其他網站廣告出現..
《煩請自己copy開去,通知你們嘅好友》
Facebook已同意第三者廣告商任意運用你地係Facebook入面0既相片,
"請Click Settings入面0既Privacy Settings,
再選擇News Feeds & Wall, 選擇Facebook Ads果頁,
係drop down box選擇No One再Save changes."
咁就可以避免你0既相係其他網站廣告出現..
《煩請自己copy開去,通知你們嘅好友》
星期二, 7月 21, 2009
Backup websams http server 步驟
1. 以 root 身份登入
2. 輸入以下指令:
mount /mnt/cdrom
sh /mnt/cdrom/grepconfig.sh
2. 輸入以下指令:
mount /mnt/cdrom
sh /mnt/cdrom/grepconfig.sh
3. 問你係咪 confirm,就答 y
4. 問你資料正唔正確,答 0
5. 問你係咪 copy 落 floppy,答 y
6. 完成後將 floppy 內資料抄起,因為 floopy 的壽命....
p.s. default setting 係用 floppy backup configure,但係都可以改 setting 做用其他野 backup~
星期一, 6月 22, 2009
兵臨城下WEB
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任務目標 聲望的獲得途徑?(多選)
建造升級建築
研究科技
聲望的作用?(多選)
新建更多的城池
升級城池 任務名稱 修繕官邸一
任務目標 [已完成] 升級官邸(等級2)
任務名稱 修繕官邸二
任務目標 [已完成] 升級官邸(等級3)
任務名稱 輕徭薄稅
任務目標 稅收的獲得途徑?(單選)
空閒人口
怎樣調整稅率?(單選)
在官府裡
任務名稱 廣施教育一
任務目標 [已完成] 建造大學殿(等級1)
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任務名稱 廣施教育二
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任務名稱 廣施教育三
任務目標 [已完成] 建造大學殿(等級3)
[已完成] 升級其它科技中的撫民技巧(等級1)
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[已完成] 招募一名武將
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任務目標 歷史名將的初始屬性比一般武將?(單選)
高
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[已完成] 建造城防工事:10個陷阱
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任務目標 威望的獲得途徑?(多選)
戰勝其他君主
討伐任務
威望的作用?(多選)
佔領更多的城池
領取俸祿
任務名稱 霸業之初
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[已完成] 製造20個透甲槍
任務名稱 趕制軍備
任務目標 軍械速造需要消耗什麼?(單選)
元寶
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[已完成] 徵募10名新兵
任務名稱 陣前點兵
任務目標 [已完成] 武裝10名步兵
[已完成] 並提升士氣到30
任務名稱 休整軍隊
任務目標 怎樣調整士兵的裝備?(單選)
在武將軍事介面裡
任務名稱 大興商貿
任務目標 [已完成] 建造市場(等級1)
任務名稱 出售軍械
任務目標 [已完成] 在市場中將你未裝備的透甲槍出售。
任務名稱 糧草先行一
任務目標 [已完成] 建造驛站(等級1)
任務名稱 糧草先行二
任務目標 [已完成] 升級驛站(等級2)
任務名稱 糧草先行三
任務目標 [已完成] 升級驛站(等級3)
任務名稱 提拔將領
任務目標 文官經驗獲得途徑有哪些?(多選)
任命太守
打擂臺
隨軍謀士
任命軍師
武將經驗獲得途徑有哪些?(多選)
行軍戰鬥
打擂臺
任務名稱 聯結諸侯
任務目標 [已完成] 建造鴻臚寺(等級1)
[已完成] 創建或加入聯盟
任務名稱 城擴百里
任務目標 當聲望到達能控制幾座城池時,能進行第一次升級?(單選)
4座
當聲望到達能控制幾座城池時,能進行第二次升級?(單選)
9座
任務名稱 民心所向
任務目標 [已完成] 使用一次安撫百姓的賑災,使民怨恢復到0值
任務名稱 征戰天下
任務目標 新手保護期內的玩家能進攻他人的城池或者被其他玩家進攻麼?(單選)
不能
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任務目標 [已完成] 提升人口上限到600
任務名稱 戰略儲備四
任務目標 [已完成] 升級倉庫(等級4)
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任務目標 [已完成] 升級倉庫(等級7)
[已完成] 升級其他科技中挖掘技巧(等級2)
任務名稱 戰略儲備八
任務目標 [已完成] 升級倉庫(等級8)
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任務名稱 戰略儲備九
任務目標 [已完成] 升級倉庫(等級9)
[已完成] 升級資源科技中的冶煉技巧(等級2)
任務名稱 戰略儲備十
任務目標 [已完成] 升級倉庫(等級10)
[已完成] 升級倉儲科技(等級1)
任務名稱 唯才是舉
任務目標 [已完成] 升級客棧(等級2)
[已完成] 升級聚賢樓(等級2)
[已完成] 再招募一個文官
任務名稱 步步為營
任務目標 [已完成] 建立一座營寨
任務目標 聲望的獲得途徑?(多選)
建造升級建築
研究科技
聲望的作用?(多選)
新建更多的城池
升級城池 任務名稱 修繕官邸一
任務目標 [已完成] 升級官邸(等級2)
任務名稱 修繕官邸二
任務目標 [已完成] 升級官邸(等級3)
任務名稱 輕徭薄稅
任務目標 稅收的獲得途徑?(單選)
空閒人口
怎樣調整稅率?(單選)
在官府裡
任務名稱 廣施教育一
任務目標 [已完成] 建造大學殿(等級1)
[已完成] 升級資源科技中的伐木技巧(等級1)
任務名稱 廣施教育二
任務目標 [已完成] 升級大學殿(等級2)
[已完成] 升級資源科技中的挖掘技巧(等級1)
任務名稱 廣施教育三
任務目標 [已完成] 建造大學殿(等級3)
[已完成] 升級其它科技中的撫民技巧(等級1)
任務名稱 招賢納士
任務目標 [已完成] 建造客棧(等級1)
[已完成] 建造酒館(等級1)
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任務目標 [已完成] 啟動建築排程
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任務目標 [已完成] 建造聚賢樓(等級1)
[已完成] 招募1名文官
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任務目標 [已完成] 建造點將台(等級1)
[已完成] 招募一名武將
任務名稱 名將傳聞
任務目標 歷史名將的初始屬性比一般武將?(單選)
高
任務名稱 修築城防一
任務目標 [已完成] 城牆(等級1)
[已完成] 建造城防工事:10個陷阱
任務名稱 修築城防二
任務目標 [已完成] 城牆(等級2)
[已完成] 建造城防工事:10個滾木
任務名稱 宏圖霸業
任務目標 威望的獲得途徑?(多選)
戰勝其他君主
討伐任務
威望的作用?(多選)
佔領更多的城池
領取俸祿
任務名稱 霸業之初
任務目標 [已完成] 建造兵器鋪(等級1)
[已完成] 建造防具鋪(等級1)
[已完成] 建造車馬間(等級1)
任務名稱 打造裝備
任務目標 [已完成] 製造10個魚鱗甲
[已完成] 製造20個透甲槍
任務名稱 趕制軍備
任務目標 軍械速造需要消耗什麼?(單選)
元寶
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[已完成] 徵募10名新兵
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[已完成] 並提升士氣到30
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任務目標 怎樣調整士兵的裝備?(單選)
在武將軍事介面裡
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任務目標 [已完成] 建造市場(等級1)
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任務目標 [已完成] 在市場中將你未裝備的透甲槍出售。
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任務目標 [已完成] 建造驛站(等級1)
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任務目標 [已完成] 升級驛站(等級3)
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任務目標 文官經驗獲得途徑有哪些?(多選)
任命太守
打擂臺
隨軍謀士
任命軍師
武將經驗獲得途徑有哪些?(多選)
行軍戰鬥
打擂臺
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任務目標 [已完成] 建造鴻臚寺(等級1)
[已完成] 創建或加入聯盟
任務名稱 城擴百里
任務目標 當聲望到達能控制幾座城池時,能進行第一次升級?(單選)
4座
當聲望到達能控制幾座城池時,能進行第二次升級?(單選)
9座
任務名稱 民心所向
任務目標 [已完成] 使用一次安撫百姓的賑災,使民怨恢復到0值
任務名稱 征戰天下
任務目標 新手保護期內的玩家能進攻他人的城池或者被其他玩家進攻麼?(單選)
不能
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任務目標 [已完成] 提升人口上限到600
任務名稱 戰略儲備四
任務目標 [已完成] 升級倉庫(等級4)
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任務名稱 戰略儲備七
任務目標 [已完成] 升級倉庫(等級7)
[已完成] 升級其他科技中挖掘技巧(等級2)
任務名稱 戰略儲備八
任務目標 [已完成] 升級倉庫(等級8)
[已完成] 升級資源科技中的種植技巧(等級2)
任務名稱 戰略儲備九
任務目標 [已完成] 升級倉庫(等級9)
[已完成] 升級資源科技中的冶煉技巧(等級2)
任務名稱 戰略儲備十
任務目標 [已完成] 升級倉庫(等級10)
[已完成] 升級倉儲科技(等級1)
任務名稱 唯才是舉
任務目標 [已完成] 升級客棧(等級2)
[已完成] 升級聚賢樓(等級2)
[已完成] 再招募一個文官
任務名稱 步步為營
任務目標 [已完成] 建立一座營寨
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