Day One 1.1 Flashcards
What is the total size of an Ethernet header?
14 bytes
What information does the Source MAC address in an Ethernet header provide?
The origin of the frame’s data
What is the purpose of the Preamble in an Ethernet frame?
notify the receiving device that a frame is about to be sent and to synchronize the receiver’s clock with the sender’s clock.
Internet Protocol (IP) header
Three things reside at the physical layer of the OSI model?
Repeater, hub, network cabling
Physical layer of the OSI model is also known as:
Layer 1
What are the characteristic components of the OSI data link layer?
MAC address, network switch, ethernet frame
Layer 2 of the OSI model is also referred to as:
Data link layer
Name 4 OSI network layer components
Routing: Determines the best path for data to travel from the source to the destination.
Logical Addressing: Uses IP addresses to identify devices on the network.
Packet Forwarding: Moves packets from one network segment to another.
Fragmentation and Reassembly: Breaks down large packets into smaller ones for transmission and reassembles them at the destination.
Refers to a data link layer device designed to forward frames between network segments?
Switch
What is the name of a network layer protocol that specifies the format of packets and addressing scheme in network communications?
IP
Which OSI layer assumes the responsibility for opening, closing, and maintaining connections between applications?
session
Authentication and authorization take place at the:
session layer
Layer 5 of the OSI model is also referred to as:
Session
what three things takes place at the presentation layer of the OSI model
Data format translation,
data compression,
data encryption/decryption.
Which of the following protocols reside(s) at the application layer of the OSI model?
Happy Hippos Find Sweet Ice Pops During The Sunny Summer, Laughing
Variety of protocols that facilitate communication and data transfer between networked applications. HTTP, HTTPS, FTP, SMTP, IMAP POP3, DNS, Telnet, SSH, SNMP, LDAP
In the OSI model, the physical layer PDU is known as:
bit
In the OSI model, the layer 2 PDU is called:
Frame
Which of the following answers refer to the OSI layer 2 header data?
Source MAC address
Destination MAC address
In the OSI model, the layer 3 PDU is known as
packet
Here are some key components typically found in a Network layer header:
Source IP address, Destination IP address, Protocol, TTL, Checksum, ID, flags and fragment offset.
User Datagram Protocol (UDP) is a connection-oriented protocol using a three-way handshake which is a set of initial steps required for establishing network connection. UDP supports retransmission of lost packets, flow control (managing the amount of data that is being sent), and sequencing (rearranging packets that arrived out of order). Example applications of UDP include transmission of text and image data.
false
Transmission Control Protocol (TCP) is an example of a connectionless protocol. Because TCP does not support three-way handshake while establishing a network connection, it is referred to as unreliable or best-effort protocol. Example applications of TCP include transmission of video and audio streaming data.
false
In the OSI model, the layer 4 TCP PDU is known as:
Datagram
Which of the following answers does not refer to the OSI TCP segment header
Layer 3 header
