2.3 CQ Flashcards
Which of the following allows for network throttling of individual computers or applications?
Image A. QoS
Image B. Port forwarding
Image C. DMZ
Image D. DHCP
A. Quality of service (QoS) is a technology used in SOHO routers that can throttle bandwidth and give higher priority to individual computers or applications. Port forwarding is used to forward outside network ports to internal IP addresses. A demilitarized zone (DMZ) is a protected area between the LAN and the Internet—often inhabited by company servers. The Dynamic Host Configuration Protocol (DHCP) is the protocol in charge of automatically handing out IP address information to clients.
Which of the following forwards an external network port to an internal IP address/port on a computer on the LAN?
Image A. NAT
Image B. Port forwarding
Image C. DMZ
Image D. DHCP
B. Port forwarding is used to forward external network ports to an internal IP and port. This is done so a person can host services such as FTP internally. Network address translation (NAT) is used by most routers to convert the internal network of IP addresses to the single public IP address used by the router. The demilitarized zone (DMZ) is an area that is protected by the firewall but separate from the LAN. Servers are often placed here. DHCP is the protocol that governs the automatic assignment of IP addresses to clients by a server.
Which of the following is described as the simultaneous sending and receiving of network data?
Image A. Half-duplex
Image B. Latency
Image C. PoE
Image D. Full-duplex
D. Full-duplex is when a network adapter (or other device) can send and receive information at the same time. Half-duplex is when only sending or receiving can be done at one time. Latency is the delay it takes for data to reach a computer from a remote location. PoE is Power over Ethernet, a technology that allows devices to receive data and power over an Ethernet network cable.
