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What is a broadcast domain? A broadcast domain is the set of hosts and network devices that will receive all broadcasts sent on a network segment.
Using CSMA/CD, a node does what before sending traffic? Using Carrier Sense Multiple Access with Collision Detection, the node will first listen to the wire before sending traffic.
If two nodes send a packet at the same time and they collide, what happens next? The nodes wait a random amount of time and then retransmit.
What’s the main difference between how switches and routers handle broadcasts? Switches will forward broadcasts, but routers won’t.
Of hubs, switches, repeaters, and bridges, which devices are typically used to break up a collision domain? Switches and bridges break up collision domains.
What device regenerates an electrical signal, allowing it to travel further than it could on its own? A repeater.
Name four main purposes of the Application layer. The Application layer ensures the remote partner is available; that the needed resources for this communication are available; and that both sides of the communication agree on data integrity procedures. Authentication also occurs at this layer.
Name three main purposes of the Presentation layer. Operating system compatibility,proper data encapsulation for network transmission, and data formatting.
What layer handles the building and teardown of the connection between the two end points? The Session layer handles building and tearing down the connection.
Name three main purposes of the Transport layer. Data flow controls, error checking mechanisms, and the reliable arrival of messages.
When the Transport layer uses a connection-oriented method of transporting data, what protocol is it using? TCP is connection-oriented.
When the Transport layer uses a connectionless method of transporting data, what protocol is it using? UDP is connectionless.
What is the term for the part of router memory that holds packets that are awaiting processing? The buffer.
What term refers to the synchronization and acknowledgement process two parties go through when building a TCP connection? This is the “three-way handshake”.
What is “windowing”? Windowing is used in TCP. It refers to the sender not waiting for an acknowledgement from the receiver for every single packet before sending more packets.
Of IP, OSPF, EIGRP, and RIP, which is a routed protocol? IP is a routed protocol.
What’s the difference between a routed protocol and a routing protocol? A routing protocol discovers and exchanges routes; the routed protocol are just what they sound like; they’re the protocols that get routed.
Which layer concerns itself with file, print, database, application, and message services? The Application layer
What layer uses port numbers to keep data from different applications separate? The Session layer.
How many layers make up the Cisco hierarchical model? Three.
Name the layers of the Cisco hierarchical model, from the innermost to the outermost. Core, Distribution, Access.
Under what circumstances will a host on an Ethernet segment send a “jam signal”? A host that is currently transmitting packets will send a jam signal to another host on the same segment that attempts to being transmission.
What type of cable is used to connect a router to a switch? A straight-through cable.
What type of cable is used to connect a host directly to the COM port of a router? A rolled cable.
At what layers of the OSI model is data referred to as “data”? The top three layers – Application, Presentation, and Session.
At what layer of the OSI model is data referred to as “packets”? The Network layer.
At what layer of the OSI model is data referred to as “data segments” or “segments”? The Transport layer.
What is the purpose of the Address Resolution Protocol? ARP is used when the Layer 3 address of a remote device is known, but the Layer 2 address is not.
What protocol can a diskless workstation use to obtain its IP address when it knows its MAC address? A diskless workstation in this situation will use RARP – Reverse Address Resolution Protocol.
True or False: When CSMA/CD is in effect, a host will send a jam signal prior to transmitting data. False; A host only sends a jam signal if it is transmitting and another host on the wire attempts to transmit at the same time.
True or False: At the Presentation layer, data is referred to as “packets”. False. At the Presentation level,data is referred to as “data”. “Packets” are found at the Network layer.
True or False: Authentication is typically handled at the Application layer. True. As the Application layer is the uppermost layer, and the layer that the end user has actual input with, it makes sense that any prompts for authentication would have to come at this layer.
True or False: The Session layer uses IP addresses to keep different data streams separate. False. The Session layer uses port numbers to keep different data streams separate.
True or False: The most appropriate devices to use to break up a collision domain are switches and bridges. Answer: True.
True or False: In a network, a regenerator is used to strenghten an electical signal, giving it greater range. Answer: False. This is performed by a repeater.
True or False: The uppermost layer of the OSI model is the Physical layer. Answer: False. The Physical layer is the bottom layer. The Application layer is the top layer.
True or False: TCP does not necessarily wait for an "ack" from the receiver for every single packet before the sender transmits more packets. Answer: True. This is referred to as "windowing".
True or False: A cable is considered a Layer 1 device. Answer: True. While a cable is not usually thought of as a "device", it does run at Layer 1.
True or False: OSPF is a routed protocol. Answer: False: OSPF is a routing protocol, becuause it discovers routes. IP is a routed protocol.
True or False: The Cisco hierarchical model closely mirrors the OSI model. Answer: False. The Cisco hierarchical model is a three-layer model referencing layers of a campus network; the OSI model is a seven-layer model illustrating data transfer processes.
True or False: When connecting a host directly to the COM port of a router, you should use a rolled cable. Answer: True.
True or False: When connecting a switch to a router, use a crossover cable. Answer: False. A switch-router connection calls for a straight-through cable.
Created by: papid69
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