CompTIA Network+ Certification (N10-003) Part 15

An intranet is made up of all networks under a single administrative control and can be thought of as an internal internetwork. Thus resources made available to intranet users are only available to users on that network.

Anti-Virus software uses virus definitions and signatures to detect viruses. New, unidentified or unknown viruses will not be detected. For this reason, virus definitions should be downloaded regularly from the vendor's Web site.

Only ports 25 and 110 are open. All other ports are blocked. Port 25 is used by SMTP, which is required for e-mail delivery and port 110 is used by POP3, which is used for e-mail retrieval.

An extranet is similar to an intranet, which is made up of all networks under a single administrative control. The exception is that an extranet is an expansion of the intranet to include a few external or outside networks.

An extranet allows for limited access and data sharing with authorized users outside of the organizations.

An intranet would not be accessible from outside the organization and thus would not allow data sharing outside of the organization.

An extranet is similar to an intranet, which is made up of all networks under a single administrative control. The exception is that an extranet is an expansion of the intranet to include a few external or outside networks.

Port 25 is used by SMTP for e-mail delivery. Since SMTP has stopped, it is possible that port 25 has been blocked.

An intranet may use Internet applications, such as e-mail and may be connected to the Internet. However, an intranet would not be accessible from outside the organization and thus would not allow access via the public telecommunications system.

An intranet is made up of all networks under a single administrative control and can be thought of as an internal internetwork. Thus resources made available to intranet users are only available to users on that network.

Disk mirroring is the process of writing the data simultaneously to two disks so that the two are exact copies of one another. The two drives are attached to a single disk controller.

Anti-Virus software uses virus definitions and signatures to detect viruses. New, unidentified or unknown viruses will not be detected.

VLANs allow you to configure virtual subnets on the switch itself, rather than requiring separate routers and other network equipment. Separate network segments reduce broadcast traffic as broadcast traffic is not transmitted to the other segments.

In a hot site, every computer system and every bit of information has a redundant copy. This provides 100% fault tolerance for systems that must be up 100% of the time. Hot sites are strictly fault-tolerant implementations, not disaster recovery implementations. Budgets for this type of fault tolerant implementation are typically large because each computer system must have a redundant copy.

VLANs allow you to configure virtual subnets on the switch itself, rather than requiring separate routers and other network equipment. Separate network segments reduce broadcast traffic as broadcast traffic is not transmitted to the other segments.

VLAN-capable switches use the switch management software to segment a network within the switch itself. This saves you the expense of additional network hardware or recabling. However, each VLAN corresponds to a different IP subnet. Therefore a router is required to change the packets between VLANs, even though the destination host is connected to the same switch.

VLAN-capable switches use the switch management software to segment a network within the switch itself. This saves you the expense of additional network hardware or recabling. However, each VLAN corresponds to a different IP subnet. Therefore a router is required to change the packets between VLANs, even though the destination host is connected to the same switch.

In a hot site, every computer system and every bit of information has a redundant copy. This provides 100% fault tolerance for systems that must be up 100% of the time. Hot sites are strictly fault-tolerant implementations, not disaster recovery implementations. Budgets for this type of fault tolerant implementation are typically large because each computer system must have a redundant copy.

A Dictionary attack involves guessing possible passwords for entering as another user. The attacker must have access to the network.

To provide optimum protection on the network, you should ensure that all systems, workstations and servers included, have Anti-Virus software installed on them.

Plain text documents cannot be infected by viruses.

A network that allows limited access to users outside of the organizations is called an extranet.

TCP port 80 is used by HTTP. The firewall has been configured to block egress traffic, therefore outbound HTTP traffic will be blocked.

VLAN membership is not defined by FQDN.

E-mail servers detect the viruses in the messages received from various sources and send warnings to the recipient to warn him/her of the risky mail. This server has the necessary means to reject infected mail content. E-mail servers have their own virus scanners to filter all the incoming mail before it reaches the server. An e-mail server is a middle man in the delivery of the message.

An extranet allows for limited access and data sharing with authorized users outside of the organizations.

Microsoft Word documents can be infected by macro viruses while executable files can also contain viruses.

Disk duplexing uses mirroring to write data to two disks so that the two are exact copies of one another but each drive is attached to its own disk controller.

Your antivirus software should scan all your incoming mail before you can even read it.

An intranet would not be accessible from outside the organization and thus would not allow data sharing outside of the organization.