體能活動的分類及劇烈程度

體能活動指任何由骨骼肌所產生，並能增加能量消耗至高於基本水平的身體活動。它可劃分成兩大類，第一類是「運動」，即有系統和重複性的身體活動；另一類是 「非運動性體能活動」，例如站立、往返學校或工作間、做家務或工作等。兩者又可再按其劇烈程度分類為低度劇烈、中度劇烈和劇烈。劇烈的體能活動（如緩步跑）較中度劇烈的體能活動（如快步行）能為生理健康帶來更大裨益，亦能消耗更多卡路里（按每時間單位），而低度劇烈的體能活動（如散步）則勝過完全沒有體能活動。

劇烈程度	體能活動
	運動	非運動性體能活動
劇烈	例子： 緩步跑、快速游泳、跳快舞、跳繩、打網球（單打）、打籃球、踢足球	例子： 與小孩或狗玩追逐遊戲、做粗重的園藝工作（連續挖掘或鋤地）
中度	例子： 快步行、水中有氧運動、打網球（雙打）、在平路上踏單車、包含撞與投的運動（例如排球和棒球）	例子： 行樓梯、抱小孩、抹地、洗擦浴缸、洗車、做一般園藝工作
低度	例子： 散步、伸展運動、舉起練手啞鈴、仰臥起坐、站立對著牆做掌上壓	例子： 站立、洗碗碟、洗熨衣服、煮食、彈琴

再者，不同類別的運動或體能活動會有不同的健康裨益。抗阻運動(如舉重和健身橡筋帶操)能增加肌肉的強度和耐力及保持或增加肌量。於發育期進行負重運動可增加骨質、於成年期進行負重運動則有助維持最高骨質峰值及減慢骨質隨年齡增長的流失速度。柔軟活動（例如太極和瑜珈）可保持肌肉放鬆及關節靈活。

對大部份人而言，增加活動量是絕對安全的。然而，有些人士在開始運動前可能需要體格檢查。

Determining an Effective Troubleshooting Strategy

Topic title: Using layered models for network-device troubleshooting

1, During which stage of the encapsulated data flow process does an end system take data from an application and convert it as needed for transmission over a physical network?

Choose an option.

The forwarding stage
The origination stage <correct answer>
The terminating stage
The transport stage

2, What kind of device is a multilayer switch considered to be?

Choose an option.

Layer 1
Layer 2
Layer 3 <correct answer>
Layer 1/2


3, Which TCP/IP layer maps to the Physical and Data Link layers of the OSI model?

Choose an option.

The Application layer
The Internet layer
The Network Interface layer <correct answer>
The Transport layer

4, During which stage of the encapsulated data flow process does data pass over the physical medium as bits?

Choose an option.

The forwarding stage
The origination stage
The terminating stage
The transport stage <correct answer>


5, What kind of device is a standard switch considered to be?

Choose an option.

Application layer
Data-link layer <correct answer>
Network layer
Transport layer

6, What kind of device is a hub considered to be?

Choose an option.

Data-link layer
Network layer
Physical layer <correct answer>
Transport layer


7, Which TCP/IP layer is responsible for exchanging segments between devices on a TCP/IP network?

Choose an option.

The Application layer
The Internet layer
The Network Interface layer
The Transport layer <correct answer>


8, The network interface TCP/IP layer maps to which OSI layers?

Choose more than one option.

The application layer
The data-link layer <correct answer>
The network layer
The physical layer <correct answer>
The session layer


9, The Application TCP/IP layer maps to which OSI layers?

Choose more than one option.

The Application layer <correct answer><correct answer>
The Network layer 
The Presentation layer <correct answer> <correct answer>
The Session layer <correct answer>





Topic title: Following the general network troubleshooting process


1, Which of the following tasks should you perform if you discover a new problem when testing the solution?

Choose more than one option.

You isolate the problem to identify the cause
You document the attempted solution <correct answer>
You return to the beginning of the troubleshooting process <correct answer>
You reapply solutions that you attempted earlier


2, During which stage of the general troubleshooting process should you identify characteristics of problems?

Choose an option.


Correcting the problem
Gathering symptoms
Isolating the problem <correct answer>


3, What is the first stage in the general troubleshooting process?

Choose an option.

Correcting the problem
Gathering symptoms <correct answer>
Isolating the problem


4, Identify the true statements about the general troubleshooting process.

Choose more than one option.

Stages are mutually exclusive
Problem solutions may cause other unidentified problems <correct answer>
You can retrace your steps at any point in the process <correct answer>
You should establish a policy for each stage <correct answer>



5, Identify the stages in the general troubleshooting process.

Choose more than one option.

You document all network devices
You correct the problem <correct answer>
You gather symptoms <correct answer>
You identify network components
You isolate the problem <correct answer>

6, During which stage of the general troubleshooting process should you use questions as a method of localizing the problem to a smaller range of possibilities?

Choose an option.

Correcting the problem
Gathering symptoms <correct answer>
Isolating the problem


7, During which stage of the general troubleshooting process do you document a solution?

Choose an option.

Correcting the problem <correct answer>
Gathering symptoms
Isolating the problem


=========================================



Topic title: Gathering network, user, and end-system symptoms


1, Which stage in the process of gathering network symptoms involves identifying if the problem is at the core, distribution, or access layer of the network?

Choose an option.

You analyze existing symptoms
You determine ownership
You determine symptoms
You document symptoms
You narrow the scope <correct answer>

2, All of the symptoms have been gathered at an end system but the problem is still not resolved. What should you do next?

Choose an option.


You begin isolating the symptoms to identify a single problem <correct answer>
You assign a new IP address for the end system
You reboot the end system
You replace the end system


3, Which command shows the current state of the IP routing table on a Cisco device?

Choose an option.

route print
route -n
show ip route <correct answer>
show routing table


4, Which stage in the process of gathering network symptoms involves developing a description of the problem?

Choose an option.

You analyze existing symptoms <correct answer>
You determine ownership
You determine symptoms
You document symptoms
You narrow the scope

5, Which stage in the process of gathering network symptoms involves determining if the problem is more likely a hardware or software configuration problem?

Choose an option.

You analyze existing symptoms
You determine ownership
You determine symptoms <correct answer>
You document symptoms
You narrow the scope


6,Which stage in the process of gathering network symptoms involves identifying whether a problem is inside or outside the boundary of your control?

Choose an option.

You analyze existing symptoms
You determine ownership <correct answer>
You determine symptoms
You document symptoms
You narrow the scope

7, Which UNIX and Mac command displays information relating to IP configuration of an end system?

Choose an option.

ifconfig -a <correct answer>
ifconfig /all
ipconfig -a
ipconfig /all


8, Which command tests connectivity by sending an echo request packet to an address and waiting for a reply?

Choose an option.

ping <correct answer>
show ip route
telnet
tracert


9, Which Windows command will identify the route that a packet takes through a network?

Choose an option.

ping
route -n
traceroute
tracert <correct answer>