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ITN101 EXAM 1 QUESTIONS WITH COMPLETE
SOLUTIONS
The seventh layer of the OSI model is the? -- Answer ✔✔ Application layer The IP (Internet Protocol) operates in the Transport layer -- Answer ✔✔ False Switches operate at which layer of the OSI model? -- Answer ✔✔ Data link layer Which of the following protocols is considered unreliable communication protocol? -- Answer ✔✔ UDP (User Datagram Protocol) The data in this layer is called a packet -- Answer ✔✔ Network layer What does PDU stand for? -- Answer ✔✔ Protocol data unit IPv4 addresses have _____ bits and IPv6 address are ____ bits -- Answer ✔✔ 16 / 128 Traditional MAC addresses contain ____ parts. Each part is ____ bits in size -- Answer ✔✔ 2 / 24
DNS is made up of three elements. Which of the following is not one of them -- Answer ✔✔ Transmitter This ensures data is transmitted to the correct application -- Answer ✔✔ Port number Which of the following is NOT considered a Reserved IP address? -- Answer ✔✔ 10.0.0. An IP address and a port number written together is called a ____? -- Answer ✔✔ Socket UDP (user datagram protocol) provides error checking, but not sequencing? -- Answer ✔✔ False At what layer of the OSI model would a TCP or UDP header be added to a payload? -- Answer ✔✔ Layer 4 The TCP (transmission control protocol) ___________________ is performed before TCP transmits the actual data -- Answer ✔✔ Three-way handshake What happens when a router receives a packet with a TTL of 0? -- Answer ✔✔ The router drops the packet and sends an ICMP TTL expired message back to the host. IPv4 and IPv6 use the same packet format? -- Answer ✔✔ False
In IEEE terminology, a group of stations that share an access point are said to be part of what option below? -- Answer ✔✔ Basic service sets A power fluctuation that results in a temporary dimming of lights is known as a blackout.? -- Answer ✔✔ False What is the maximum allowable distance for horizontal wiring? -- Answer ✔✔ 100 meters At what layer of the OSI model do the 802.11 standards vary? -- Answer ✔✔ Physical layer Which method of transmission allows signals to travel in both directions over a medium simultaneously? -- Answer ✔✔ Full-duplex Which 802.11 wireless innovation allows for the use of multiple antennas on an access point that can issue a signal to one or more receivers? -- Answer ✔✔ MIMO (Multiple- input, multiple-output) Where is a demarc located in relation to the structured cabling of an enterprise environment? -- Answer ✔✔ Main Distribution Frame (MDF) Multimode fiber contains a core that is larger than a single mode fiber core? -- Answer ✔✔ True What is the maximum supported throughput of a CAT6 cable? -- Answer ✔✔ 10 Gbps
Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time? -- Answer ✔✔ Half-duplex Which of the following options is not a likely source of electromagnetic interference? -- Answer ✔✔ Fiberoptics cables What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI? -- Answer ✔✔ Noise __________ is an outdated wireless technology that has been mostly replaced by Bluetooth to connect personal devices. -- Answer ✔✔ Infrared Physical layer, also considered bits -- Answer ✔✔ Layer one Data link layer, also considered a frame (physical addressing) -- Answer ✔✔ Layer two Network layer, also considered a packet (logical addressing) -- Answer ✔✔ Layer three Transport layer, also considered a segment -- Answer ✔✔ Layer four Session layer, also considered data -- Answer ✔✔ Layer five Presentation layer, also considered data -- Answer ✔✔ Layer six
