Question 48

What is the minimum size of an Ethernet frame?

Group of answer choices

64 bytes

1,024 bytes

256 bytes

1,500 bytes

Question 49

Data is organized into frames for transmission at which OSI level?

Group of answer choices

Application

Network

Data Link

Transport

Question 50

Which of the following devices does not limit network broadcast traffic and does not increase performance?

Group of answer choices

Router

NIC

Hub

Switch

Question 51

Which of the OSI layers does IP operate?

Group of answer choices

Session

Transport

Physical

Data Link

Network

Presentation

Application

Question 52

You have an interface on a router with the IP address of 192.168.192.10/29. What is the broadcast address the hosts will use on this LAN?

Group of answer choices

192.168.192.15

192.168.192.127

192.168.192.31

192.168.192.255

192.168.192.63

Question 53

What is the distance limitation of 100BaseT?

Group of answer choices

100 meters

250 meters

185 meters

500 meters

Question 54

Which layer of the TCP/IP model is mapped to the bottom two layers of the OSI model?

Group of answer choices

Internet

Link

Application

Transport

Question 55

A MAC address is composed of which two parts?

Group of answer choices

the network address and the node address

the computer name and the node address

the organizationally unique identifier and the unique device ID of the NIC

the IP address and the NICs serial number

Question 56

Which layer of the TCP/IP model is mapped to the top three layers of the OSI model?

Group of answer choices

Internet

Link

Application

Transport

Question 57

Which of the following can operate at both layers 2 and 3 of the OSI model?

Group of answer choices

Bridge

Switch

Repeater

Hub

Question 58

Which of the following is not identified in a cabling specification such as 10BaseT?

Group of answer choices

the signal type

the maximum length

the speed

the maximum number of routers

Question 59

Which of the following OSI layers is responsible for establishing connections between two devices?

Group of answer choices

Session

Transport

Network

Application

Question 60

Which setting configures a network interface to both send and receive data, but not at the same time?

Group of answer choices

Simplex

Full duplex

Half duplex

Time-division duplexing

Question 61

A network device that is used to connect multiple devices without segmenting a network is a:

Group of answer choices

router

bridge

hub

switch

Question 62

If your network subnet mask is /16, what is the maximum number of host IDs available for this network?

Group of answer choices

62

254

65,534

16,277,214

Question 63

What is the binary equivalent of the decimal value 97?

Group of answer choices

00110001

01100001

01001110

01101010

Question 64

Which network card setting configures the interface to send and receive data at the same time?

Group of answer choices

Simplex

Full duplex

Half duplex

Time-division duplexing

Question 65

Which of the following network components would be used to create VLANs?

Group of answer choices

Routers

Gateways

Switches

Bridges

Question 66

A host is rebooted and you view the IP address that it was assigned. The address is 169.123.13.34. Which of the following happened?

Group of answer choices

The host received an APIPA address

The host received a public address

The host receive a multicast address

The host received a private address

Question 67

What is the maximum number of IP addresses that can be assigned to hosts on a local subnet that uses the 255.255.255.224 subnet mask?

Group of answer choices

14

30

15

31

16

62

Question 68

What information do bridges use to determine whether to forward traffic?

Group of answer choices

MAC addresses

IP addresses

traffic conditions at the time

nothing because bridges forward all traffic

A preliminary survey shows that 33% of college students smoke. In a class of 43 students, what is the probability that more than 48% of the students smoke? Use Appendix B.1 for the z-values. (Round the z-value to 2 decimal places and the final answer to 4 decimal places.) Probability

1. What is proportion of the students exercise regularly? Select a random sample of 95 students and 62 said they exercise regularly. Construct 90% confidence interval for the proportion of all students exercising regularly.
   1. Find the critical value.
   2. Calculate the margin of error.
   3. Write the interval.

Please show work, thanks!

A recent study of college students indicates that 30% of all college students had at least one tattoo. A small private college decided to randomly and independently sample 15 of their students and ask if they have a tattoo. Find the standard deviation for this distribution.

Select one:

4.50

1.77

3.55

3.15

A study of undergraduate computer science students examined changes in major after the first year. The study examined the fates of 256 students who enrolled as first-year students in the same fall semester. The students were classified according to gender and their declared major at the beginning of the second year. For convenience we use the labels CS for computer science majors, EO for engineering and other science majors, and O for other majors. The mean SAT mathematics scores for the students are summarized in the following table. Major Gender CS EO O Males 628 618 589 Females 582 631 543 Summarize the results of this study using appropriate plots and calculations to describe the main effects and interaction.

1. Each of the following situations describes error in a statistical experiment, where a researcher is trying to find the percentage of American college students who identify as Democrats or Republicans. State whether this is sampling or non-sampling error, and explain why you chose that answer.
   1. The researcher randomly selects 400 college students from around the country and asks them if they are Democrats or Republicans. The researcher finds that 38% of the students are Democrats, when the actual percentage is 41%.
   2. The researcher sets up a table in the cafeteria at their University, a wealthy private school in New England, and asks students who pass by if they identify as a Democrat or Republican. They find that 53% of the surveyed students identify as Republicans, when the actual percentage is 36%.

Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.818.81 hours of sleep, with a standard deviation of 1.61.6 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.

(a)  What is the probability that a visually impaired student gets less than 6.76.7 hours of sleep?

(b)  What is the probability that a visually impaired student gets between 6.66.6 and 7.847.84 hours of sleep?

(c)  Thirty percent of students get less than how many hours of sleep on a typical day?

A study of undergraduate computer science students examined changes in major after the first year. The study examined the fates of 256 students who enrolled as first-year students in the same fall semester. The students were classified according to gender and their declared major at the beginning of the second year. For convenience we use the labels CS for computer science majors, EO for engineering and other science majors, and O for other majors. The mean SAT mathematics scores for the students are summarized in the following table.

	Major
Gender	CS	EO	O
Males	628	618	589
Females	582	631	543

Summarize the results of this study using appropriate plots and calculations to describe the main effects and interaction.

A study of undergraduate computer science students examined changes in major after the first year. The study examined the fates of 256 students who enrolled as first-year students in the same fall semester. The students were classified according to gender and their declared major at the beginning of the second year. For convenience we use the labels CS for computer science majors, EO for engineering and other science majors, and O for other majors. The mean SAT mathematics scores for the students are summarized in the following table.

	Major
Gender	CS	EO	O
Males	628	618	589
Females	582	631	543

Summarize the results of this study using appropriate plots and calculations to describe the main effects and interaction.