What is a similar remote access mechanism?
A similar remote access mechanism is the remote procedure call mechanism. As with local procedures, a requester must know the procedure's name and the proper parameters. The requester calls the remote procedure and the blocks awaiting the remote procedure's response.
What are the different options for secure remote access?
Let’s look at a few of the common options for secure remote access: A common remote access technology in use today is the IPsec VPN. A piece of software called a VPN client is installed on the end user’s computer and is configured with details about the target network, such as the gateway IP address and a pre-shared security key.
How does remote procedure processing work?
The requester calls the remote procedure and the blocks awaiting the remote procedure's response. The called procedure performs the requested service, and, on return of control to the caller, the caller unblocks and continues processing.
Which channel access mechanism is used in a beacon-enabled network?
Depending on network configuration, one of two channel access mechanisms can be used. In the beacon-enabled network with superframes, a slotted carrier sense multiple access-collision avoidance (CSMA-CA) mechanism is used. In networks without beacons, unslotted CSMA-CA is used.
Which of the following network services or protocols use TCP IP port 22?
Table 1 Common TCP/IP Protocols and PortsProtocolTCP/UDPPort NumberSecure Shell (SSH) (RFC 4250-4256)TCP22Telnet (RFC 854)TCP23Simple Mail Transfer Protocol (SMTP) (RFC 5321)TCP25Domain Name System (DNS) (RFC 1034-1035)TCP/UDP5314 more rows•Apr 30, 2012
Which port does Telnet use?
port 23This application is based on the connection-oriented Transmission Control Protocol (TCP). By default, a telnet server listens on port 23 for incoming connections from clients.
Which port must be opened in the firewall of a Windows system so that a remote desktop connection can be established?
TCP port 3389Remote Desktop requires TCP port 3389 to be open. Also, opening UDP port 3389 enables acceleration since RDP 8.0. It is possible to change the port used by the terminal server (or PC which is accessed), see this Microsoft support article: How to change the listening port for Remote Desktop.
Which of the following protocols do email clients use to download messages from a remote mail server?
Which of the following TCP/IP protocols do email clients use to download messages from a remote mail server? The POP3 protocol is part of the TCP/IP protocol suite. It is used to retrieve email from a remote server to a local client over a TCP/IP connection.
What is remote desktop access?
Remote access (or remote desktop) is the ability to access a computer or device from another device, at any time, and from anywhere.
What is computer telnet?
Telnet is a network protocol used to virtually access a computer and to provide a two-way, collaborative and text-based communication channel between two machines. It follows a user command Transmission Control Protocol/Internet Protocol (TCP/IP) networking protocol for creating remote sessions.
What is remote port?
The remote port is the port number on the remote computer, in this case the client that is connecting to your SQL server. In most protocols (including SQL Server) the client uses a randomly chosen port number, so the remote port setting in the firewall rule needs to be configured to the default setting of "All Ports".
How do I access remote desktop connection?
On your local Windows PC: In the search box on the taskbar, type Remote Desktop Connection, and then select Remote Desktop Connection. In Remote Desktop Connection, type the name of the PC you want to connect to (from Step 1), and then select Connect.
How do I access a remote port?
You can open the Remote Desktop Connection client by going to Run –> mstsc. Simply put, the default port for using the Remote Desktop Protocol is 3389. This port should be open through Windows Firewall to make it RDP accessible within the local area network.
Which of the following provides a mechanism for retrieving emails from a remote server for a mail recipient?
Post Office ProtocolThe correct answer is option 1. Key Points POP stands for Post Office Protocol. It provides a standard mechanism for retrieving emails from a remote server for a mail recipient.
Which two of the following are common protocols used to access emails stored on a remote mail server select all answers that apply?
SMTP and Email There are three common protocols used to deliver email over the Internet: the Simple Mail Transfer Protocol (SMTP), the Post Office Protocol (POP), and the Internet Message Access Protocol (IMAP). All three use TCP, and the last two are used for accessing electronic mailboxes.
Which protocol is used for receiving emails from remote servers?
SMTP. The Simple Mail Transfer Protocol (SMTP) is used for sending and receiving e-mail between e-mail clients and servers.
What is telnet port 23?
Port 23 is typically used by the Telnet protocol. Telnet commonly provides remote access to a variety of communications systems. Telnet is also often used for remote maintenance of many networking communications devices including routers and switches.
Does telnet use TCP or UDP?
TCP protocolNote: Telnet is an application that operates using the TCP protocol. UDP connectivity can not be tested using Telnet.
How do I check if port 23 is open?
Type "Network Utility" in the search field and select Network Utility. Select Port Scan, enter an IP address or hostname in the text field, and specify a port range. Click Scan to begin the test. If a TCP port is open, it will be displayed here.
How do I check if port 3389 is open?
Open a command prompt Type in "telnet " and press enter. For example, we would type “telnet 192.168. 8.1 3389” If a blank screen appears then the port is open, and the test is successful.
What is remote access technology?
A common remote access technology in use today is the IPsec VPN. A piece of software called a VPN client is installed on the end user’s computer and is configured with details about the target network, such as the gateway IP address and a pre-shared security key. Each time the user wants to connect to the corporate network, they start the VPN client, which creates a secure connection to the corporate firewall.
Does IT need to touch each machine?
The IT department does not need to touch each machine that needs remote access. Network administrators can set up granular security policies for specific resources on the corporate network, even down to a single web-based application. Software clients are available for mobile devices such as iPhones and iPads.
Is VPN required for telecommuting?
Being able to connect securely to your corporate network from a remote location using a Virtual Private Network (VPN) is important, and it may be required by your job if you are a telecommuter. There are some remote access technologies that are widely used, but some new methods have recently emerged that have the ability to change how we work.
Is DirectAccess a LAN?
DirectAccess is not going to gain widespread adoption until the OS licensing requirements are revised and the networking is reworked to be more straightforward. While IPv6 is the future of networking, we currently live and work in an IPv4 world, especially on the LAN (as of May 2014, IPv4 still carried more than 96% of Internet traffic worldwide, according to Google ). Setting up a new remote access technology should not require one or more potentially expensive projects before it can be deployed.
What is contention based random access?
A contention-based random access mechanism is used by the mobile stations to transmit bandwidth request information to the base station. Prioritized bandwidth requests are supported over the bandwidth request channel. In the legacy uplink zone with PUSC subchannelization, a BW-REQ tile is formed by four contiguous sub-carriers over six OFDM symbols. There are three BW-REQ tiles per BW-REQ channel, where each BW-REQ tile carries one BW-REQ preamble. In the new uplink zones, a BW-REQ tile is formed by six contiguous sub-carriers over six OFDM symbols, where each BW-REQ channel consists of three distributed BW-REQ tiles, and each BW-REQ tile carries one BW-REQ preamble and one quick access message. The MS may only transmit the BW-REQ sequence and leave the resources for the quick access message unused. As shown in Figure 10-18, the BW-REQ tile consists of a preamble ( Aij) and data ( Bij) sub-carriers. The BW-REQ preamble is transmitted over four sub-carriers and six OFDM symbols. The data portion of the BW-REQ tile occupies two contiguous sub-carriers over six OFDM symbols and is used for transmission of the quick access message for the three-step bandwidth request procedure.
Does MPEG-2 have conditional access?
Although the MPEG-2 systems layer does not specify any conditional access (CA) mechanism, it does provide “hooks” for including conditional access control information in the system multiplex. Conditional access is not required and may be omitted if the multiplex is to be sent in the clear.
