Quiz 1 Flashcards
Which of the following is a connectionless network layer?
SFTP
UDP
TCP
IP
UDP and TCP are Transport Layer. IP is Network layer and can only be made connection oriented if coupled with TCP.
What layer of the OSI corresponds to label A and B?
Application
Presentation
A
Transport
Network
B
Physical
A is the session layer, and B is the data link layer.
Which of the following correctly describes encapsulation as opposed to decapsulation?
As data moves down through the OSI model layers (on a host) it is encapsulated with a header at each OSI Layer whether it be a segment, packet, or frame.
What OSI reference model layer is responsible for formatting the data encryption?
Presentation Layer (Layer 6)
Which IEEE standard defines wired Ethernet as it is used on modern networks?
IEEE 803.3 standard
Other common IEEE standard s included 802.1 (bridging), 802.2 (LLC), and 802.11 (wireless Ethernet)
What layer of the OSI reference model enforces the Maximum Transmission Unit (MTU) size allowed for transmitted frames?
Data Link Layer
Which of the following layers of the OSI reference model is primarily concerned with forwarding data based on logical addresses?
Network Layer
What is the name of the PDU (protocol data unit) in the physical layer of the OSI reference model?
Bits
What is the name of the mechanism used by TCP to increase and decrease the number of segments that are sent between each other before an acknowledgment is required?
TCP uses a mechanism called windowing to control the number of segments that are sent between one device and another before an acknowledgment is required. This “window” slides (or adjusts) as the available bandwidth between devices increases and decreases based on negotiation between devices.
Which of the following is NOT a characteristic of the Media Access Control (MAC) sublayer of the data link layer (layer 2) of the OSI reference layered model?
-layer 2 devices transmit to logical network addresses
-The MAC sublayer uses a physical address call a MAC, which is a 48-bit (6 byte ) address assigned to a device network interface card
-method of transmitting on the media
- The use of flow control on a network to prevent a receiver from being overwhelmed.
The use of flow control on a network to prevent a receiver from being overwhelmed.
Which scales easily? Client/server network or Peer-to -Peer?
Client/server networks can scale easily, which might require the purchase of additional client licenses.
Which is more expensive? Client/server networks or Peer-to-Peer networks? Why?
Client/server networks can cost more than peer-to-peer networks. For example, client/server networks might require the purchase of dedicated server hardware and a network OS with an appropriate number of licenses.
Which OSI reference model layer is responsible for the following?
Setting up session
Maintaining a session
Tearing down a session
Session layer (Layer 5)
Which of the following can sequence a received set of segments correctly to reassemble a data stream?
TCP
Which option is a benefit of implementing a client/server arrangement over a peer-to-peer arrangement?
-Scalability
-Easy installation
-Cheaper
-Centralized administration
Scalability and Centralized administration
