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What is layer 7 of the OSI model? ✔✔application What layer number is the Application layer of the OSI model? ✔✔ 7 What is layer 6 of the OSI model? ✔✔presentation What layer number is the Presentation layer of the OSI model? ✔✔ 6 At which OSI layer is encryption / decryption? ✔✔ 6 or presentation At which OSI layer is data compression? ✔✔ 6 or presentation What is layer 5 of the OSI model? ✔✔session What layer number is the Session layer of the OSI model? ✔✔ 5
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What is layer 4 of the OSI model? ✔✔transport What layer number is the Transport layer of the OSI model? ✔✔ 4 What does MTU stand for? ✔✔maximum transmission (or transfer) unit What is the typical value for MTU (in bytes)? ✔✔ 1500 At which OSI layer are software ports? ✔✔ 4 or transport What does TCP stand for? ✔✔transmission control protocol Which protocol provides for guaranteed delivery of information? ✔✔TCP, or Transmission Control Protocol At which OSI layer is TCP? ✔✔ 4 or transport
What does WAN stand for? ✔✔wide area network At which OSI layer is IP Addressing? ✔✔ 3 or network At which OSI layer is Logical Addressing? ✔✔ 3 or network At which OSI layer does a router operate? ✔✔ 3 or network At which OSI layer does a gateway operate? ✔✔ 3 or network At which OSI layer is Network Address Translation? ✔✔3 or network At which OSI layer is Port Address Translation? ✔✔ 3 or network At which OSI layer do we find packets? ✔✔ 3 or network
What is the Protocol Data Unit at OSI layer 3? ✔✔packet What is layer 2 of the OSI model? ✔✔datalink What layer number is the Data Link layer of the OSI model? ✔✔ 2 What does MAC stand for? ✔✔media access control How does a typical laptop computer discover its own MAC address? ✔✔It already knows it. It is burned in on the network card. At which OSI layer is the Local Area Network? ✔✔ 2 or datalink At which OSI layer is MAC Addressing? ✔✔ 2 or datalink At which OSI layer is Physical Addressing? ✔✔ 2 or datalink At which OSI layer is Ethernet? ✔✔ 2 or datalink
At which OSI layer is wireless signal? ✔✔ 1 or physical At which OSI layer is coaxial cable? ✔✔ 1 or physical At which OSI layer is cat5 cable? ✔✔ 1 or physical At which OSI layer is fiber-optic cable? ✔✔ 1 or physical What is a multi-port repeater called? ✔✔hub What is a two-port hub called? ✔✔repeater At which OSI layer does a hub operate? ✔✔ 1 or physical At which OSI layer does a signal repeater operate? ✔✔ 1 or physical At which OSI layer do we find bits? ✔✔ 1 or physical
What is the Protocol Data Unit at OSI layer 1? ✔✔bits What is a software port? ✔✔A port is a number that indicates which computer program should receive the message. What is a hop? ✔✔A hop is the moving of a packet from one LAN to another. What does TTL stand for? ✔✔time to live What is the purpose of TTL? ✔✔It reduces the risk of network loops. What does having a routable address mean? ✔✔Packets can be sent to you by using your own IP address. What are the five non-routable IP address blocks? ✔✔10.x.x.x, 127.x.x.x, 169.254.x.x, 172.16- 31.x.x, and 192.168.x.x.
What is a keep-alive? ✔✔A keep-alive is a message that is sent between two computers just to keep the connection from timing out and being dropped.
