CompTIA Network+ Certification (N10-003) Part 6

A firewall prevents attackers on the Internet from direct access to LAN computers. It is often referred to as the first line of defense for a network with Internet connectivity

A repeater simply regenerates the signal it receives on one port, boosting the signal and sending it out on another port as if it were the original physical source of the transmission. In this way it increases the signal strength, allowing it to travel further.

A Wireless Access Point (WAP) is the connection point for a wireless network.

A hub or switch is the central connection point for a host in a star topology.

A hub transmits data out all its ports.

NAT maps multiple private IP addresses to a single public IP address, allowing users to access a public network such as the Internet. It can be implemented on a router or a firewall.

Category 5 UTP cable is rated for transmission speed of up to 100 Mbps

1000Base-TX is rated at 1000 Mbps adn Category 5e UTP cable is rated for transmission speeds of up to 1000 Mbps

Category 5e UTP cable is rated for a maximum transmission speed of 1000 Mbps

A transceiver is an adapter that allows a networking device to connect to a different type of media than it was designed for. It can be used to connect a NIC with a DB-15 AUI port to a UTP cable used by a 100Base-TX switch.

IEEE 802.11b operates at a maximum speed of 11 Mbps

A gateway is any hardware and software combination that connects dissimilar network environments

A modem modulates digital data onto an analog carrier for transmission over the internet and demodulates from the analog carrier to a digital signal at the receiving end. It is used to connect a host to the Internet via an Internet Service Provider (ISP).

IEEE 802.11b and IEEE 802.11g uses the 2.4 GHz frequency band

Category 3 UTP cable is rated for transmission speeds of up to 16 Mbps

IEEE 802.11a and IEEE 802.11g have transmission speeds of up to 54 Mbps

Although the 1000Base-TX switch is rated at 1000 Mbps, the Category 5 UTP cable is rated for a maximum transmission speed of only 100 Mbps.

A router can connect multiple similar or dissimilar network segments into an internetwork

A gateway is capable of translating data from one protocol to another and can connect dissimilar network environments that do not use the same protocols.

A router connects different network segements together and is responsible for transmitting packets between different network segments

IEEE 802.11a uses the 5 GHz frequency band

A gateway is any hardware and software combination that connects dissimilar network environments, such as a local area network and the Internet.

A router connects two or more network segments together and routes packets between the two segments.

1000Base-LX can use either single-mode or multi-mode fiber optic cable. However, multi-mode 1000Base-LX has a maximum transmission distance of only 550 meters while single-mode 1000Base-LX has a maximum transmission distance of 2000 meters.

A gateway is any hardware and software combination that connects dissimilar network environments and can be used to connect a LAN to a mainframe environment.

NAT maps multiple private IP addresses to a single IP address, allowing users to access a public network such as the Internet, but can be implemented on a router or firewall, not a switch.

A router connects multiple segments of a network together

A modem modulates and demodulates between digital and analog signals

Routers do not use broadcast traffic to locate a host. It used tables instead.

A bridge connects two similar network segments together but keeps traffic separated on both sides of the bridge. Traffic is only allowed to pass through the bridge if it is intended for a host on the other side of the bridge.