Network Models and Protocols - OSI reference model, TCP-IP suite, switching techniques, addressing, ports - One Line Questions
1.
Which well-known port number is typically used for the HTTP protocol? —
80
2.
What is the maximum length of a standard Ethernet frame? —
1500 bytes
3.
The Secure Sockets Layer (SSL) or Transport Layer Security (TLS) protocol typically uses which port number for secure web traffic? —
443
4.
Which protocol is responsible for assigning IP addresses dynamically to devices on a network? —
DHCP
5.
What is the fundamental difference between broadcast and multicast addressing? —
Broadcast sends to all nodes, multicast sends to a specific group.
6.
Which switching technique does not require a dedicated path and allows multiple users to share network resources dynamically? —
Packet Switching
7.
The concept of virtual circuits is most closely associated with which type of switching? —
Packet Switching
8.
In the OSI model, the Session Layer manages: —
Dialogue control between applications
9.
Which layer of the OSI model is responsible for the physical transmission of data bits over a communication medium? —
Physical Layer
10.
The Internet Layer in the TCP/IP model is equivalent to which OSI layer? —
Network Layer
11.
Which protocol is used to map an IP address to a MAC address on a local network? —
ARP
12.
What is the primary function of the Data Link Layer in the OSI model? —
Error detection and correction on a link
13.
What is the primary function of the Network Access Layer in the TCP/IP model? —
Interface to the physical network medium
14.
What is the unit of data at the Network Layer of the OSI model? —
Packet
15.
In packet switching, data is broken down into smaller units called: —
Packets
16.
The Transport Layer in the OSI model provides which of the following services? —
Process-to-process delivery and reliability
17.
What is the main advantage of packet switching over circuit switching? —
Efficient use of network resources
18.
Which protocol is used for transferring files between a client and a server? —
FTP
19.
Which protocol is used for sending and receiving email messages? —
SMTP
20.
In the TCP/IP model, the Application Layer protocols like HTTP, FTP, and SMTP reside at which layer? —
Application Layer
21.
MAC addresses are typically assigned by: —
The network interface card manufacturer
22.
Which addressing scheme is used at the Data Link Layer to uniquely identify network interfaces on a local network segment? —
MAC Address
23.
In the context of TCP/IP, a socket is defined by: —
IP Address and Port Number
24.
Message switching involves sending an entire message as a single unit. This method is less efficient than packet switching because: —
Intermediate nodes must store the entire message before forwarding.
25.
What type of addressing is used at the Network Layer to identify devices across different networks? —
IP Address
26.
Which address type is globally unique and routable across the internet? —
IP Address
27.
In the TCP/IP model, which layer corresponds to the OSI Physical and Data Link layers? —
Network Access Layer
28.
Which layer in the TCP/IP model provides end-to-end communication services and includes protocols like TCP and UDP? —
Transport Layer
29.
Which layer of the OSI model is concerned with the physical characteristics of the transmission medium? —
Physical Layer
30.
Which layer is responsible for translating network addresses (like IP addresses) into physical addresses (like MAC addresses)? —
Data Link Layer
31.
Which layer of the OSI model is responsible for end-to-end connection management and reliability between source and destination hosts? —
Transport Layer
32.
Which switching technique connects two devices directly with a dedicated physical path for the duration of a connection? —
33.
Which type of switching is commonly used in traditional telephone networks? —
Circuit Switching
34.
Which switching technique is characterized by the use of fixed-size blocks of data called cells? —
Cell Switching
35.
Which switching method involves breaking data into small, fixed-size packets called cells, often used in ATM networks? —
Cell Switching
36.
Asynchronous Transfer Mode (ATM) uses a form of switching that breaks data into fixed-size packets called: —
Cells
37.
The Application Layer in the TCP/IP model encompasses functionalities of which OSI layers? —
Session, Presentation, and Application
38.
Which layer of the OSI model provides network services directly to the end-user applications? —
Application Layer
39.
Which of the following is NOT a function of the Transport Layer? —
Path determination
40.
Which protocol operates at the Transport Layer of the TCP/IP model and offers fast, connectionless communication with no reliability guarantees? —
UDP
41.
What is the primary protocol used for logical addressing and routing in the Internet Layer of the TCP/IP model? —
IP
42.
Which protocol is used for sending error messages and operational information regarding network conditions in the TCP/IP suite? —
ICMP
43.
What is the main difference between TCP and UDP? —
TCP provides reliability and ordered delivery, UDP does not.
44.
What is the role of the Domain Name System (DNS)? —
To translate domain names into IP addresses
45.
What is the purpose of a port number in network communication? —
To differentiate between different applications or processes running on a host
46.
What is the purpose of the Presentation Layer in the OSI model? —
To provide common data representation
47.
Which layer of the OSI model is responsible for logical addressing (IP addresses) and routing packets across networks? —
Network Layer
48.
Which OSI layer handles the establishment, maintenance, and termination of communication sessions between applications? —
Session Layer
49.
Which of the following protocols operates at the Transport Layer of the TCP/IP model and provides reliable, connection-oriented communication? —
TCP
50.
The Presentation Layer is responsible for: —
Data formatting, encryption, and compression