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NETWORKING FAQS

What are the seven layers of the OSI model?



A.
Physical Layer - covers the physical interface between devices and the rules by which bits are passed from one to another.

Data Link Layer - attempts o make the physical link reliable and provides the means to activate, maintain, and deactivate the link.

Network Layer - provides for the transfer of information between end systems across

some sort communications network.

Transport Layer - provides a mechanism for the exchange of data between end system.

Session Layer - provides the mechanism for controlling the dialogue between applications

in end systems.

Presentation Layer - defines the format of the data to be exchanged between applications

and offers application programs a set of data transformation services.

Application Layer - provides a means for application programs to access the OSI environment.

Name the seven layers of the OSI Model and describe them briefly.

Discuss it!



A. In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software.

What is (Wireless / Computer) Networking?

Discuss it!



A. Wireless networks utilize radio waves and/or microwaves to maintain communication channels between computers. Wireless networking is a more modern alternative to wired networking that relies on copper and/or fiber optic cabling between network devices.

A wireless network offers advantages and disadvantages compared to a wired network. Advantages of wireless include mobility and elimination of unsightly cables. Disadvantages of wireless include the potential for radio interference due to weather, other wireless devices, or obstructions like walls.

What is Wireless Computer Networking?

Discuss it!



A. In networking, the communication language used by computer devices is called the protocol. Yet another way to classify computer networks is by the set of protocols they support. Networks often implement multiple protocols to support specific applications. Popular protocols include TCP/IP, the most common protocol found on the Internet and in home networks.




Basic Concepts

What are the seven layers of the OSI model? Name the seven layers of the OSI Model and describe them briefly. What is (Wireless / Computer) Networking? What is Wireless Computer Networking? Network Protocols? Wired vs Wireless Networking How is Network Performance Measured? Is there any difference between bps (small b) and Bps (capital b)? Definition: HTTP - What is the difference between a client and a server, and what is client/server networking? What is peer-to-peer networking? What is an intranet? Who Created the Internet Network? Router Hub

The Physical Layer

Physical layer Some name of physical layer Introduction to Hubs Ethernet What are the types of Transmission media?

Teh Data Link Layer

What is the difference between a hub and a switch? Which one is better for my network? LAN - Local Area Network Data Link layer Some name of datalink layer WAN - Wide Area Network Virtual LANs (VLANs) what is the advantage and disadvantage of local area networks? Can we use static and dynamic routing in one network? What is a Bridge? When is it used? How is a bridge configured? What are the software and hardware components of a bridge?

The Network Layer

Network layer Name of some Network layer What is a port number? What are the types of protocols and what are its functions and for what purpose this protocol is used give me a brief IP address What is the difference between physical address and logical address? Router What is the difference between TCP and UDP? What is a router? What is a gateway? In the TCP client-servel model, how does the three-way handshake work in opening connection? What is the purpose of exchanging beginning sequence numbers during the the connection in the TCP client-server model? How does Asynchronous Transfer Mode (ATM) work? Given a Class B Network with subnet mask of 255.255.248.0 and a packet addressed to 130.40.32.16, what is the subnet address? What are the 3 major classes of IP network? What is a Class D IP address What addresses do multicast start with? What is OSPF? What is BGP? Define an autonomous system? What does the Ether type code do? Dial on demand? How many bytes in an IPX network address? What is LANE? Why is it necessary? What are the differences between a meshed and a star topology? Describe some of the advantages and disadvantages of each in a WAN context. What are the minimum and maximum sizes of packets in an 802.3 Ethernet protocol? What is the difference between TCP/IP host name and netBIOS host name? What is Ipsec tunneling, how it works? What is piggy backing? Which protocol is used for retrieving mails? you are given the IP address can u tell how many computers can be connected?What do you look at? Describe a 3-way TCP/IP Handshake? Under what situations a packet can go into infinite loop in a network ? Name any field of IP header that can prevent a packet to loop infinitely ? What is MTU of a link ? What is fragmentation of a packet ? What is the default subnet mask for an ipv6 address ? What is RAID? What is the Network Time Protocol? What is subnetting? why is it used? What are the important topologies for networks? What is Beaconing? What is frame relay, in which layer it comes? How Gateway is different from Routers? What are the different type of networking / internet working devices? What is mesh network? What is Bandwidth? What is ICMP?

The Transport Layer

Transport layer name of some Transport layer What is the 5-4-3-2-1 rule of network design? Describe how data can be effectively communicated from the transmitter to the receiver? What is the difference between POP3 and IMAP Mail Server? What is the difference between collision domain and broadcast domain? What is difference between baseband and broadband transmission? What are the possible ways of data exchange? What is point-to-point protocol? What are the two types of transmission technology available?

The Application Layer

Application layer HTTP FTP TELNET What the difference between DNS and WINS? What are the Advantages and Disadvantages of DHCP? What is the main purpose for creating this OSI Reference Model ? Why it is a layered model? What is terminal emulation, in which layer it comes?

Network Security

what is Firewall ? Network Firewalls and Broadband Routers Network Firewalls and Proxy Servers what do hardware firewalls do exactly? Which home computers need antivirus (and/or firewall) software?

Network Programming

What is a socket? Types of sockets How to Creat sockets Associating a socket with a connection How to do Sending and receiving data over a socket How to do Closing a socket. What is Address Resolution How do we do Address Formation in socket how we do Byte Ordering what is Internet Addresses ? Internet protocols name out some of the Internet protocols, and explain briefly each one of them: what are 'well known ports' across Internet Byte Order,Big Endian,Little Endian Roles of Clients in scoket Roles of Servers pesudo code of Single Client Servers code of Single Client Servers pesudo code of multi Client Servers Code of multi-client server Name of Internet Clients Name Internet Servers What does a socket consists of?