CompTIA Network+ Exam Quiz

Which layer of the OSI model is responsible for physical transmission media types?

• Layer 1—Physical

• Layer 2—Data Link

• Layer 3—Network

• Layer 4—Transport

What devices work at layer 2 of the OSI model?

• Load balancer, advanced firewall, intrusion detection system (IDS)

• Network interface card (NIC), bridge, switch, wireless access point (AP)

• Transceiver, repeater, hub, media converter, modem

• Router, basic firewall

Which layer of the OSI model forwards datagrams/packets via routers using logical network addresses?

• Layer 1—Physical

• Layer 2—Data Link

• Layer 4—Transport

• Layer 3—Network

What is the function of Layer 4—Transport in the OSI model?

• Present requests and responses from server or client software with structured headers and data payload

• Establish data formats (such as character sets)

• Identify application data using port numbers

• Establish rules for exchange of messages and sequencing (dialog control)

What is the scope of SOHO routers?

• Local area network (LAN) scope

• Multifunction network appliance

• Combine modem, switch, wireless access point, router, firewall

• Wide area network (WAN) scope

What functions are associated with the Data Link Layer in a SOHO network?

• Implement a Wi-Fi standard

• Ethernet switch

• Specify allow/block rules for IP addresses

• Filtering between public and private zones (firewall)

What is the purpose of the Internet Assigned Numbers Authority (IANA)?

• Internet Corporation for Assigned Names and Numbers (ICANN)

• Internet Engineering Taskforce (IETF) and requests for comments (RFCs)

• Regional Internet Registries (RIRs) and ISPs

• Manages IP address allocation and namespaces

What is the hexadecimal notation for the number 255?

• FF = 255

• 11111111 = (1x2x2x2x2x2x2x2)+(1x2x2x2x2x2x2)+(1x2x2x2x2x2)+(1x2x2x2x2)+(1x2x2x2)+(1x2x2)+(1x2)+1 = 255

• A=10,B=11,C=12,D=13,E=14,F=15

• 255 = (2x10x10) + (5x10) + 5

What lab activity type guides you step-by-step through tasks?

• Applied labs

• Complete lab

• Assisted labs

• Cancel lab without grading

What is the function of RJ-45 ports in a SOHO network?

• Radio antennas for wireless signaling

• Ethernet switch

• Modem for WAN connectivity

• Cabled network connections