Net+ Day 2 Ports, Protocols and Network Devices

A company is deploying a new web server and needs to ensure secure remote access for administrators. Which port is most likely used for this purpose?

• SSH (22)
• FTP (21)
• Telnet (23)
• HTTPS (443)

Answer explanation

SSH (Secure Shell) is the standard protocol for secure remote login to network devices. FTP (File Transfer Protocol) is used for file transfer, Telnet is an insecure remote access protocol, and HTTPS is used for secure web browsing.

You suspect a network device is malfunctioning and want to remotely access its configuration menu. Which protocol would be most appropriate for this task?

• SNMP (161)
• Telnet (23)
• HTTP (80)
• HTTPS (443)

Answer explanation

SNMP (Simple Network Management Protocol) is used for network device management and configuration retrieval. Telnet is an insecure remote access protocol, HTTP is used for web browsing, and HTTPS is used for secure web browsing.

A user reports they can't access a specific website but can access others. Which network device is most likely causing the issue?

• Firewall
• Router
• Switch
• Access Point

Answer explanation

A router is responsible for routing traffic between networks, and a misconfiguration could block access to specific destinations. Firewalls can also block traffic, but this would likely affect all websites. Switches manage communication within a network segment, and Access Points provide wireless network access.

Technicians are troubleshooting a network where some devices cannot communicate with each other. All devices are connected to the same switch. What is the MOST LIKELY cause of this issue?

• Incorrect VLAN configuration
• Faulty switch port
• Damaged network cable
• Outdated network drivers

Answer explanation

VLANs (Virtual LANs) can segment a network and restrict communication between devices on different VLANs. A faulty switch port could also cause communication issues, but this would likely only affect a single device. Damaged network cables and outdated network drivers are less likely to cause complete communication failure between multiple devices.

A user complains their video calls keep dropping. Which network protocol is likely responsible for transmitting video data?

• TCP
• UDP
• DNS
• SMTP

Answer explanation

UDP (User Datagram Protocol) is a connectionless protocol often used for real-time applications like video calls due to its speed. TCP (Transmission Control Protocol) is a connection-oriented protocol that guarantees delivery but can introduce latency. DNS (Domain Name System) translates domain names to IP addresses, and SMTP (Simple Mail Transfer Protocol) is used for email delivery.

Technicians are setting up a new network printer. Which port is typically used for printer communication?

• LPT1 (parallel)
• COM1 (serial)
• Port 25 (SMTP)
• Port 9100 (IPP)

Answer explanation

Port 9100 (IPP - Internet Printing Protocol) is the most common port used for network printer communication. LPT1 and COM1 are legacy ports typically not used in modern networks. Port 25 is used for email communication.

A technician is troubleshooting a wireless network where devices have difficulty connecting. What is the MOST LIKELY reason for this issue?

• Incorrect SSID configuration
• Weak signal strength
• Damaged antenna
• Outdated wireless standard

Answer explanation

Weak signal strength can cause connection problems for wireless devices. Incorrect SSID configuration, damaged antenna, and outdated wireless standard could also be factors, but weak signal strength is the most common culprit.

A company wants to implement a wireless network with enhanced security. Which WPA mode would provide the strongest encryption?

• WPA
• WPA2
• WPA3
• WPA2 (AES)

Answer explanation

WPA3 is the latest and most secure WPA mode, followed by WPA2 with AES encryption. WPA and WPA2 with TKIP encryption offer weaker security.

Network technicians are performing cable continuity checks. Which tool is BEST suited for this task?

• Cable tester
• Punch down tool
• Crimping tool
• Toner

Answer explanation

A cable tester can diagnose faults and verify cable continuity. Punch down tools are used to terminate cables on patch panels, crimping tools attach connectors to cables, and toners are used for printing.

A user reports slow internet browsing speeds. What network device could be causing this bottleneck?

• Router
• Switch
• Access point
• Firewall

Answer explanation

Routers are responsible for internet traffic routing, and congestion or limitations on the router's capabilities could lead to slow browsing speeds. Switches manage communication within a network segment and wouldn't directly impact internet speed. Access points provide wireless access and wouldn' t affect wired browsing speeds. While firewalls can sometimes impact performance, it's less likely to be the sole cause of slow browsing.