network+ – Flashcard
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What are two examples of functions that are performed by proxies?
answer
• block employees from accessing certain websites • cache web pages
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need to reduce the amount of web pages that are downloaded over the leased connection without decreasing performance; what do you install?
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• install a proxy server
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what allows you to save frequently-accessed websites on your local network for later retrieval?
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• proxy
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what device accepts incoming client requests and distributes those requests to specific servers?
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• load balancer
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people want to access your private network through the internet while traveling; what do you implement?
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• VPN concentrator
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how does a proxy server differ from a packet filtering firewall?
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• a proxy server operates at the application layer, while a packet filtering firewall operates at the network layer
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which device is used on a LAN and offers guaranteed bandwidth to each port?
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• switch
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which network component connects a device with the transmission media and allows it to send and receive messages?
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• network interface card
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which hardware device links multiple networks and directs traffic between networks?
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• router
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how does a switch function?
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• it connects multiple cable segments (or devices) and forwards frames to the appropriate segment
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an access point that conforms to the IEEE 802.11b standard acts most closely to what other networking device?
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• hub
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what device sends signals from a computer onto a network?
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• transceiver
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which hardware devices regenerates a signal out all connected ports without examining the frame or packet contents?
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• hub and repeater
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how does a modem work?
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• it modulates digital data from the PC into analog data and transmits it on a telephone network
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how do switches and bridges learn where devices are located on a network?
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• when a frame enters a port, the source MAC address is copied from the frame header
