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3 years ago

Which tcp/udp port does the dns service use to communicate?

1 answer:

7 0

Port 53

Man sometimes the answer minimum of 20 to explain is a bit unnecessary.
It's port 53 what else do you need to know?

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Sketch f(x) = 5x2 - 20 labelling any intercepts.

Norma-Jean [14]

Answer:

The graph of the function is attached below.

The x-intercepts will be: (2, 0), (-2, 0)

The y-intercept will be: (-20, 0)

Explanation:

Given the function

$f\left(x\right)\:=\:5x^2-\:20$

As we know that the x-intercept(s) can be obtained by setting the value y=0

$y=\:5x^2-\:20$

switching sides

$5x^2-20=0$

Add 20 to both sides

$5x^2-20+20=0+20$

$5x^2=20$

Dividing both sides by 5

$\frac{5x^2}{5}=\frac{20}{5}$

$x^2=4$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{4},\:x=-\sqrt{4}$

$x=2,\:x=-2$

so the x-intercepts will be: (2, 0), (-2, 0)

we also know that the y-intercept(s) can obtained by setting the value x=0

$y=\:5(0)^2-\:20$

$y=0-20$

$y=-20$

so the y-intercept will be: (-20, 0)

From the attached figure, all the intercepts are labeled.

8 0

3 years ago

What is company NDR?

lina2011 [118]

Answer:

Explanation:

NDR is a multinational American based company with international branches in Thailand, Cambodia, and Myanmar in the telecom industry and media with sales of over US$100 Million. The company develops application store (APP Store) and application (APP) for mobile devices with 700,000+ apps in the app store.

7 0

3 years ago

What port number is the web server listening on for the web request?

Veronika [31]

80 for HTTP, 443 for HTTPS

8 0

3 years ago

You want to connect the LAN port on a router to the uplink port on a switch. The switch does not support auto-MDI. Which type of

kirza4 [7]

Answer: Crossover

Explanation:

Based on the information given in the question, the type of cable that should be used is the crossover cable.

Crossover cable is used for a direct connection of computing devices. A crossover cable is typically used for the connection of computing devices that are of identical types.

Since the LAN port on a router is to be connected to the uplink port on a switch and the switch does not support auto-MDI, the crossover cable can be used.

3 0

3 years ago

The sales management team requires that the Lead Source field of the Lead record be populated when a Lead is converted. What wou

Sav [38]

Answer: A. Validation rule

Explanation:

Validation rules can be used to ensure that fields are populated because they can verify if the data being inputted meet the requirements of the administrators by returning a 'True' or 'False' response after testing. If the result is false, the user will be unable to move on until they adjust the field.

For example, Field length checks on websites are a Validation rule where you are only allowed to input a set number of characters and anything less or more will be denied, such as in the case of inputting phone numbers.

By including a Validation Rule that the LeadSource field of the Lead record be populated when a Lead is converted, the developer will be able to make sure that a user populates the Lead Source field prior to converting a Lead.

5 0

3 years ago