Other Network Stuff...
Give an example of a Peer to Peer Network.
In a peer-to-peer (P2P) networking model, data is exchanged between two network devices without the use of a dedicated server.
When a user types a domain name of a website into the address bar of a web browser, the workstation sends a DNS request to the DNS server for the name resolution process.
This request is and example of a _____________ model.
This request is a client/server model application.
What are the features of POP?
What are the features of IMAP?
IMAP and POP are protocols that are used to retrieve email messages.
POP delivers the emails to the clients and deletes them on the email server.
The advantage of using IMAP instead of POP is that when the user connects to an IMAP-capable server, copies of the messages are downloaded to the client application.
IMAP then stores the email messages on the server until the user manually deletes those messages.
IMAP is preferred for small-to medium-sized businesses as IMAP allows centralized storage and backup of emails, with copies of the emails being forwarded to clients.
How does FTP work?
FTP is a client/server protocol. FTP requires two connections between the client and the server and uses TCP to provide reliable connections. With FTP, data transfer can happen in either direction. The client can download (pull) data from the server or upload (push) data to the server.
What layer in the OSI model that is responsible for formatting, compressing, and encrypting data?
The presentation layer
What are the commonalities between peer to peer and client server models?
In both the client/server and peer-to-peer network models, clients and servers exist. In peer-to-peer networks, no dedicated server exists, but a device can assume the server role to provide information to a device serving in the client role.
What do the following do?
DNS
HTTP
SMTP
FTP
The Domain Name Service (DNS) protocol resolves Internet names to IP addresses.
Hypertext Transfer Protocol (HTTP) transfers files that make up the web pages of the World Wide Web.
The Simple Mail Transfer Protocol (SMTP) transfers mail messages and attachments. Telnet, a terminal emulation protocol, provides remote access to servers and networking devices.
The File Transfer Protocol (FTP) transfers files between systems.
What commands are used by HTTP in regards to a web server?
What is HTTPS?
The GET command is a client request for data from a web server.
A PUT command uploads resources and content, such as images, to a web server.
A POST command uploads data files to a web server.
HTTPS is a secure form of HTTP used to access web content hosted by a web server.
How does DHCP work?
When a host configured to use DHCP powers up on a network it sends a DHCPDISCOVER message. FF-FF-FF-FF-FF-FF is the L2 broadcast address.
A DHCP server replies with a unicast DHCPOFFER message back to the host.
The Host then replies with a DHCPREQUEST
The server then responds with a DHCPACK which acknowledges the lease acceptance and contains the client’s IP address
What layer provides data exchange and the interface between the system and the network
application layer
What does DNS do externally and on an internal network?
Two important functions of DNS are to (1) provide IP addresses for domain names such as www.cisco.com, and (2) forward requests that cannot be resolved to other servers in order to provide domain name to IP address translation.
It doesn't matter if it is your local network or out on the internet. If your local server has a DNS server set up for onsite file and other server the DNS will route you to the correct location.
The Session, Presentation and Application layers for the OSI model perform the function of what layer of the TCP/IP model?
The application layer of the TCP/IP model represents the session, presentation, and application layers of the OSI model.
The components of the URL http://www.Tygerpride.com/index.htm are as follows:
The components of the URL http://www.Tygerpride.com/index.htm are as follows:
What is SMB and how does it work?
The Server Message Block protocol is a protocol for file, printer, and directory sharing. Clients establish a long term connection to servers and when the connection is active, the resources can be accessed. Every SMB message has the same format. The use of SMB differs from FTP mainly in the length of the sessions. SMB messages can authenticate sessions.
SMB is used in Microsoft networking for file-sharing and print services. The Linux operating system provides a method of sharing resources with Microsoft networks by using a version of SMB called SAMBA.
What is the name that is used to uniquely identify a website and is used instead of the IP address
The domain name
What does nslookup do?
Nslookup is a command-line utility that is used to send a query to DNS servers to resolve a specific host name to an IP address.
What does the Application layer of the TCP/IP model do?
The application layer of the TCP/IP model is the layer that is closest to the end user, providing the interface between the applications. It is responsible for formatting, compressing, and encrypting data, and is used to create and maintain dialog between source and destination applications.
What is an advantage of SMB over FTP?
SMB clients can establish a long-term connection to the server.
What type of information is contained in a DNS MX record?
The domain name mapped to mail exchange servers
What does URL stand for?
Uniform Resource Locator - the "friendly" address that is used in a web browser bar and that corresponds to the IP address of the site
What does HTTP stand for?
Hypertext Transfer Protocol - used to request and transfer hypertext data between clients and servers
What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza?
The Gnutella protocol is used when one user shares an entire file with another user. A person would load a Gnutella-based application such as gtk-gnutella or WireShare and use that application to locate and access resources shared by others.
What layer is used to arrange the communication between source and destination applications and responsible for the state of the conversation?
The session layer