CompTIA Network+

Which layer of the OSI model is responsible for logical addressing and routing packets between networks?

• AData Link layer
• BNetwork layer
• CTransport layer
• DSession layer

A network administrator needs to allow only HTTPS traffic into the network while blocking all other inbound connections. Which TCP port must be permitted?

• APort 80
• BPort 443
• CPort 8080
• DPort 8443

Which of the following IP addresses belongs to the 192.168.10.0/24 network?

• A192.168.11.1
• B192.168.9.254
• C192.168.10.200
• D192.168.100.1

A technician is configuring a server with an IPv6 address. The address FE80::1/64 is assigned. What type of IPv6 address is this?

• AGlobal unicast address
• BLink-local address
• CMulticast address
• DLoopback address

Which protocol automatically assigns IP addresses, subnet masks, default gateways, and DNS server addresses to client devices?

• AARP
• BDHCP
• CDNS
• DICMP

A company is planning to migrate its on-premises servers to a cloud environment where each customer's workload runs on dedicated hardware that is not shared with other customers. Which cloud deployment model best describes this?

• APublic cloud
• BCommunity cloud
• CPrivate cloud
• DHybrid cloud

Which OSI model layer is responsible for establishing, maintaining, and terminating sessions between applications?

• ATransport layer
• BPresentation layer
• CSession layer
• DApplication layer

A network engineer needs to subnet 192.168.1.0/24 into subnets with at least 30 usable host addresses each. Which subnet mask should be used?

• A/25 (255.255.255.128)
• B/26 (255.255.255.192)
• C/27 (255.255.255.224)
• D/28 (255.255.255.240)

Which protocol operates at the Application layer and is used to securely transfer files between a client and a server using an encrypted connection?

• AFTP
• BTFTP
• CSFTP
• DSCP only

A company's DNS server returns the IP address 192.0.2.1 when queried for www.example.com. An employee reports that the website is unreachable. Which DNS record type maps a hostname to an IPv4 address?

• AAAAA record
• BCNAME record
• CA record
• DMX record

Which of the following best describes Software-Defined Networking (SDN)?

• AA networking approach that uses dedicated hardware appliances to perform all routing deci…
• BAn architecture that separates the control plane from the data plane, allowing centralize…
• CA method of bonding multiple physical links into a single logical interface
• DA technology that encrypts all data transmitted over a WAN connection

A network uses the address 10.0.0.0/8. Which of the following correctly describes this network?

• AIt is a public IP range that can be routed on the internet
• BIt is a private IP range supporting up to 16,777,214 host addresses
• CIt is a private IP range supporting up to 65,534 host addresses
• DIt is an APIPA address range assigned automatically when DHCP fails

A network administrator needs to separate HR and Finance department traffic on the same physical switch without deploying additional hardware. Which technology should be used?

• ASTP (Spanning Tree Protocol)
• BVLAN (Virtual Local Area Network)
• CLACP (Link Aggregation Control Protocol)
• DNAT (Network Address Translation)

A switch port is configured as a trunk port. What is the primary purpose of a trunk port on a managed switch?

• ATo connect end-user devices like PCs and printers
• BTo carry traffic from multiple VLANs between switches using 802.1Q tagging
• CTo prevent broadcast storms by blocking redundant paths
• DTo provide power over the network cable to connected devices

Which wireless standard operates exclusively in the 5 GHz band, supports up to 3.5 Gbps throughput, and introduced MU-MIMO technology?

• A802.11n (Wi-Fi 4)
• B802.11ac (Wi-Fi 5)
• C802.11ax (Wi-Fi 6)
• D802.11g