Networking Concepts: Devices, OSI layers, Protocols, etc
What are the four layers of the TCP/IP model?
1. Application 2. Transport 3. Internet 4. Network Interface
Access points can perform filtering at which layer(s) of the OSI model?
1. Data Link (layer 6 2. Network (layer 5) 3. Transport (layer 4)
What are the two sublayers of the OSI model Data Link layer?
1. MAC (Media Access Control) 2. LLC (Logical Link Control)
Which three tasks are associated with the OSI Data Link Layer?
1. Performs media access 2. MAC Addressing 3. Organizing bits into frames
At which two OSI layers does Serial Line Internet Protocol (SLIP) operate?
1. Physical (layer 7) 2. Data Link (layer 6)
Which three process are associated with the OSI Network Layer?
1. Routing 2. Network addressing 3. Connection services
At which layer of the OSI layer does TFTP operate?
Application (layer 1)
At which layer of the OSI model does IMAP4 operate?
Application (layer 1)
At which layer of the OSI model does NTP operate?
Application (layer 1)
What is the highest level of the OSI model?
Application (layer 1)
Which OSI layer is responsible for file, print, and message services?
Application (layer 1)
Which layer of the TCP/IP model corresponds with the OSI Application, Presentation and Session layers?
Application (layer 4)
At which layer of the OSI model does SSH operate?
Application Presentation layer (layer 1)
At which OSI layer do switches operate?
Data Link (layer 6)
At which OSI layer does the L2TP protocol operate?
Data Link (layer 6)
At which layer of the OSI model do MAC addresses and EUI-64 addresses operate?
Data Link (layer 6)
Which OSI layer is divided into the Media Access Control (MAC) and Logical link Control (LLC) sublayers?
Data link (layer 6)
Which protocol works at the OSI Application layer to transmit, update, and receive text and graphics on an IP network?
HTTP (80)
Which layer of the TCP/IP model corresponds to the OSI Network layer?
Internet Layer (layer 2)
Which type of address makes it possible for multiple devices to uniquely identify each other at the Data Link layer?
MAC address
At which OSI layer do routers perform their function?
Network (layer 5)
At which OSI layer does routing take place?
Network (layer 5)
At which OSI layer does the IPSec protocol operate?
Network (layer 5)
At which layer of the OSI model does ARP operate?
Network (layer 5)
At which layer of the OSI model does Internet Control Message Protocol (ICMP) function?
Network (layer 5)
At which layer of the OSI model does RARP operate?
Network (layer 5)
Which OSI layer is associated with the routing of data between similar and dissimilar networks?
Network (layer 5)
Which layer of the TCP/IP model corresponds to the OSI Data Link and Physical layers?
Network Interface (layer 1)
Which layer of the TCP/IP model is sometimes referred to as the Link Layer?
Network Interface layer (layer 1)
Do routers and Layer 3 switches operate at the Application layer of the OSI model?
No, they operate at the Network layer (layer 5)
Which type of firewall functions at the Network and Data Link layers of the OSI model?
Packet-Filtering firewall
Which OSI layer is associated with the network media?
Physical
At which layer does an active hub function?
Physical (layer 1)
At which layer of the OSI model do cables operate?
Physical (layer 7)
What is the lowest level of the OSI Model?
Physical (layer 7)
Which OSI layer dictates the physical topology of a network?
Physical (layer 7)
Which OSI layer is responsible for formatting data?
Presentation (layer 2)
Which OSI layer provides translations between different character sets?
Presentation (layer 2)
What is the difference between SNMP agent and SNMP manager?
SNMP agent: runs on a managed device and collect management information. SNMP manager: it's the software to run the SNMP agent
Which OSI layer transforms data into a mutually agreed-upon format, or transfer syntax, and may also compress, expand, encrypt, or decrypt data?
Session (layer 2)
Which OSI layer performs dialog control between network service requestors and providers?
Session (layer 3)
Which two connectivity devices manipulate data at the OSI Data Link layer?
Switches and Bridges
Which layer 4 protocol does FTP use?
TCP 20, 21
Which Transport layer protocol does Telnet use?
TCP 23
Which protocol is connectionless: FTP or TFTP?
TFTP (Trivial File Transport Protocol)
Which terminal-emulation protocol functions at the Application layer of the OSI model?
Telnet
Which DoD Process/Application layer protocol provides terminal emulation and remote login capability on TCP/IP networks?
Telnet (port 23)
At which OSI layer does Transmission Control Protocol operate?
Transport (layer 4)
At which OSI layer does User Datagram Protocol (UDP) operate?
Transport (layer 4)
At which layer of the OSI model does TLS operate?
Transport (layer 4)
Which OSI layer is responsible for the reliable delivery of packets in the correct sequence?
Transport (layer 4)
Which OSI layer provides reliable end-to-end error and flow control?
Transport (layer 4)
Which layer of the TCP/IP model corresponds with the OSI Transport Layer
Transport (layer 4)
Which type of firewall functions at the Transport layer of the OSI model?
circuit-level firewall
