220-1201 Practice Test 28 — 15 Questions

Question 1

A technician is configuring a small branch office network with 30 devices. The network uses a single router with DHCP enabled. To conserve IP addresses, the technician decides to use a subnet that provides exactly enough usable addresses for the devices, with minimal waste. Which subnet mask should the technician choose?

Accepted Answer

255.255.255.224. A /27 subnet (255.255.255.224) provides 30 usable addresses (32 total minus 2 reserved). This is the smallest subnet that accommodates 30 devices without wasting many addresses.

Answer

255.255.255.0

Answer

255.255.255.240

Answer

255.255.255.192

Question 2

A technician is setting up a small network for a home office. The router's WAN port receives a public IP of 203.0.113.5 from the ISP. The technician configures the LAN with a private IP range. Which of the following is a valid private IP address for the technician to assign to a workstation?

Accepted Answer

192.168.1.10. Private IP addresses are defined in RFC 1918: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. 192.168.1.10 falls within the 192.168.0.0/16 range, making it a valid private address for LAN use.

Answer

172.32.1.10

Answer

203.0.113.10

Answer

169.254.1.10

Question 3

A technician is troubleshooting a network where a user cannot access the internet. The user's workstation has an IP of 192.168.1.15, subnet mask 255.255.255.0, and default gateway 192.168.1.1. The technician pings 192.168.1.1 successfully but cannot ping 8.8.8.8. What is the most likely cause?

Accepted Answer

The router's WAN connection is down or misconfigured.. Successful ping to the gateway indicates local network connectivity is fine. Failure to ping an external IP like 8.8.8.8 suggests the router cannot reach the internet, possibly due to an ISP issue or misconfigured WAN settings.

Answer

The workstation's subnet mask is incorrect.

Answer

The DNS server is not configured on the workstation.

Answer

The workstation's IP address is a duplicate.

Question 4

A network engineer is designing a subnet scheme for a company with three departments: Sales (50 devices), HR (20 devices), and IT (10 devices). The company uses the 10.0.0.0/24 network. To minimize waste, the engineer decides to use variable-length subnet masking (VLSM). Which of the following subnet masks should be assigned to the Sales department?

Accepted Answer

255.255.255.192. With VLSM, the largest subnet should be assigned first. Sales needs 50 usable addresses, so a /26 subnet (255.255.255.192) provides 62 usable addresses, which is sufficient and efficient. Smaller subnets would not accommodate 50 devices.

Answer

255.255.255.128

Answer

255.255.255.224

Answer

255.255.255.240

Question 5

A technician is configuring a new router for a branch office. The ISP provides a public IP of 203.0.113.10/30 for the WAN interface. How many usable IP addresses does the technician have for devices on the WAN link?

Accepted Answer

2. A /30 subnet mask (255.255.255.252) provides 4 total addresses: one network, one broadcast, and two usable. This is commonly used for point-to-point WAN links to conserve public IPs.

Answer

4

Answer

6

Answer

1

Question 6

A customer reports that their internet connection drops frequently during rainstorms. They have a cable modem and a wireless router. What is the most likely cause of the intermittent connection?

Accepted Answer

The cable modem's coaxial cable connection is compromised by moisture.. Cable internet uses coaxial cables that can be susceptible to signal degradation when water enters the line, especially at connectors or splices. This is a common issue during rainstorms. DSL, fiber, and satellite are less affected by rain in this specific way, though satellite can have rain fade.

Answer

The wireless router is overheating.

Answer

The DSL filter is malfunctioning.

Answer

The satellite dish is out of alignment.

Question 7

A small office is moving to a new location and needs a dedicated, symmetrical internet connection with a guaranteed service level agreement (SLA). Which type of internet connection should be installed?

Accepted Answer

Fiber optic. Fiber optic internet provides symmetrical speeds (same upload and download) and can offer SLAs, making it ideal for business needs. Cable and DSL typically have asymmetrical speeds and no SLA, while satellite has high latency and is not suitable for business-critical applications.

Answer

Cable broadband

Answer

DSL

Answer

Satellite

Question 8

A technician is setting up internet for a rural home that is 5 miles from the nearest town. The home has no cable TV or phone line. Which internet connection type is most feasible?

Accepted Answer

Satellite. Satellite internet is available almost anywhere with a clear view of the sky, making it ideal for rural areas without wired infrastructure. Cable, DSL, and fiber all require physical infrastructure that may not reach remote locations.

Answer

Cable broadband

Answer

DSL

Answer

Fiber optic

Question 9

A user complains that their internet is slow in the evenings, especially when streaming video. They have a cable modem and a wireless router. What is the most likely cause?

Accepted Answer

Network congestion due to many users sharing the same cable node.. Cable internet uses a shared bandwidth model where many users in the same neighborhood contend for the same local loop capacity. During peak usage times (evenings), this contention leads to slower speeds. Wireless interference, router age, or ISP throttling are less likely to cause consistent evening slowdowns.

Answer

The wireless router is outdated.

Answer

The ISP is throttling streaming traffic.

Answer

Interference from other wireless networks.

Question 10

A technician is configuring a new SOHO router for a client who has a DSL internet connection. What type of cable will the technician use to connect the router to the wall jack?

Accepted Answer

Telephone cable (RJ-11). DSL uses standard telephone cables (RJ-11) to connect to the wall jack. Coaxial (RG-6) is for cable, fiber uses a specialized connector, and Ethernet (RJ-45) is used for LAN connections or some fiber modems.

Answer

Coaxial cable (RG-6)

Answer

Fiber optic cable

Answer

Ethernet cable (RJ-45)

Question 11

A customer is moving into a new apartment building that has a fiber optic terminal in the basement. They want the fastest possible internet. What equipment will the technician need to install inside the apartment to complete the connection?

Accepted Answer

An Optical Network Terminal (ONT). Fiber internet requires an Optical Network Terminal (ONT) to convert the optical signal to electrical signals for use by a router. A cable modem is for coax, a DSL modem is for phone lines, and a satellite modem is for satellite dishes.

Answer

A cable modem

Answer

A DSL modem

Answer

A satellite modem

Question 12

A user reports that their internet connection is extremely slow, and they notice the modem's 'DSL' light is blinking. They have a DSL connection. What does the blinking DSL light indicate?

Accepted Answer

The modem is trying to establish a DSL sync.. A blinking DSL light typically indicates that the modem is trying to synchronize with the ISP's DSLAM. This can be due to line noise, distance issues, or a faulty filter. A solid light means sync is established. The other options are not standard indicators for a DSL sync light.

Answer

The modem is receiving data.

Answer

The modem is not connected to the phone line.

Answer

The modem has a firmware error.

Question 13

A technician is troubleshooting a satellite internet connection that has high latency and frequent disconnections. The dish is installed on a roof with a clear view of the sky. What is the most likely cause of the high latency?

Accepted Answer

The signal has to travel a long distance to the satellite and back.. Satellite internet inherently has high latency (typically 500-800 ms) due to the long distance the signal must travel to and from the satellite in geostationary orbit. This is a fundamental characteristic, not a fault. The other options could cause disconnections but not specifically high latency.

Answer

The satellite dish is not grounded properly.

Answer

The modem is outdated.

Answer

There is interference from nearby cellular towers.

Question 14

A company is deploying a new branch office in a location where no wired internet is available. They need a reliable connection with moderate speed and low latency for VoIP and video conferencing. Which technology should they consider?

Accepted Answer

Fixed wireless (e.g., point-to-point microwave). Fixed wireless (using point-to-point or point-to-multipoint antennas) can provide reliable, low-latency connections in areas without wired infrastructure, often using licensed or unlicensed spectrum. Satellite has high latency, cellular can be inconsistent, and dial-up is too slow.

Answer

Satellite internet

Answer

Cellular 4G/5G hotspot

Answer

Dial-up

Question 15

A technician is called to a home where the customer reports that their cable internet works fine, but the TV service has pixelated channels. The technician suspects a signal issue. What is the most appropriate tool to measure the signal strength and quality on the coaxial line?

Accepted Answer

A cable tester (signal level meter). A cable tester (specifically a signal level meter or spectrum analyzer) can measure signal strength, SNR, and other parameters on coaxial cables used for cable internet and TV. A tone generator is for tracing wires, a multimeter is for electrical measurements, and an OTDR is for fiber optic cables.

Answer

A tone generator and probe

Answer

A multimeter

Answer

An optical time-domain reflectometer (OTDR)