Terms 50-100

Question 1

What is TCP 587

Answer 1

Modern email servers use port 587 for the secure submission of email for delivery. For example, if you use an email client software like Outlook or Apple Mail, it most likely is configured to use this port to send your messages.

Question 2

What is TCP 993

Answer 2

IMAP over SSL/TLS (IMAPS) is assigned the port number 993. Virtually all modern e-mail clients and servers support IMAP, which along with the earlier POP3 (Post Office Protocol) are the two most prevalent standard protocols for email retrieval.

Question 3

What is TCP 995

Answer 3

Port 995 – POP3 port used for SSL/TLS.

Post Office Protocol 3

Question 4

What is plenum rated cables

Answer 4

Plenum rated cable has a special insulation that has low smoke and low flame characteristics. Plenum cable is mandated to be installed in any “air handling” space. … This qualifies this ceiling as a plenum ceiling, and all the cables that go through that ceiling must be plenum rated.

Question 5

What is honeypot

Answer 5

In computer terminology, a honeypot is a computer security mechanism set to detect, deflect, or, in some manner, counteract attempts at unauthorized use of information systems.

Question 6

What is Duplex/Speed mismatch

Answer 6

A duplex mismatch occurs when two devices connected by Ethernet do not properly negotiate their connection. Ethernet has the option of running at different speeds (10, 100, or 1 Gbps) and has the option of running half duplex or full duplex. … A duplex mismatch will cause constant packet loss.

Question 7

What is Telnet

Answer 7

Telnet is an application protocol used on the Internet or local area network to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection.

Question 8

What is a Site survey

Answer 8

Site surveys are inspections of an area where work is proposed, to gather information for a design or an estimate to complete the initial tasks required for an outdoor activity. It can determine a precise location, access, best orientation for the site and the location of obstacles.

Question 9

What is a IP helper

Answer 9

Internet Protocol Helper (IP Helper) assists network administration of the local computer by enabling applications to retrieve information about the network configuration of the local computer, and to modify that configuration.

Question 10

What is a broadband

Answer 10

In telecommunications, broadband is wide bandwidth data transmission which transports multiple signals at a wide range of frequencies and Internet traffic types, that enables messages to be sent simultaneously, used in fast internet connections.

Question 11

What is a GSM

Answer 11

The Global System for Mobile Communications is a standard developed by the European Telecommunications Standards Institute to describe the protocols for second-generation digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December 1991.

Question 12

What is authpriv

Answer 12

authPriv — Authentication and data encryption. With this security level, users send the SHA key or password for authentication and a DES or AES128 for encryption. For groups that require authentication, encryption, or both, you must define the SHA, DES and AES128 keys or passwords on the SNMP Users page.

Question 13

What is a WAF

Answer 13

A web application firewall is a specific form of application firewall that filters, monitors, and blocks HTTP traffic to and from a web service.

Question 14

What is a DSCP

Answer 14

Differentiated services or DiffServ is a computer networking architecture that specifies a simple and scalable mechanism for classifying and managing network traffic and providing quality of service on modern IP networks.

Question 15

What is OTDR

Answer 15

An optical time-domain reflectometer is an optoelectronic instrument used to characterize an optical fiber. An OTDR is the optical equivalent of an electronic time domain reflectometer.

Question 16

What is WAP

Answer 16

Open, global specification that enables users of wireless devices to access and interact with wireless information services and applications.

Question 17

What is NAT

Answer 17

Network address translation is a method of mapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device.

Question 18

What is IEEE 802.1X

Answer 18

IEEE 802.1X is an IEEE Standard for port-based Network Access Control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.

Question 19

What is a BUS Network

Answer 19

A bus network is a network topology in which nodes are directly connected to a common half-duplex link called a bus. A host on a bus network is called a station. In a bus network, every station will receive all network traffic, and the traffic generated by each station has equal transmission priority.

Question 20

What is ST

Answer 20

ST stands for straight tip, a high-performance fiber-optic connector with round ceramic ferrules and bayonet locking features. ST connectors are more common than SC connectors. You can generally use SC and ST connectors with either single-mode or multimode fiber-optic cabling.

Question 21

What is ARP cache poisoning

Answer 21

In computer networking, ARP spoofing, ARP cache poisoning, or ARP poison routing, is a technique by which an attacker sends Address Resolution Protocol messages onto a local area network.

Question 22

What is DOCSIS modem

Answer 22

A cable modem is a type of network bridge that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial, radio frequency over glass and coaxial cable infrastructure.

Question 23

What is a NIC

Answer 23

A network interface controller is a computer hardware component that connects a computer to a computer network. Early network interface controllers were commonly implemented on expansion cards that plugged into a computer bus.

Question 24

What is a ACL

Answer 24

An access control list (ACL) contains rules that grant or deny access to certain digital environments. … Filesystem ACLs tell operating systems which users can access the system, and what privileges the users are allowed. Networking ACLs━filter access to the network.

Question 25

What is Port Security

Answer 25

Port Security helps secure the network by preventing unknown devices from forwarding packets. … Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. You can enable port security on a per port basis.

Question 26

What is MTU

Answer 26

In computer networking, the maximum transmission unit is the size of the largest protocol data unit that can be communicated in a single network layer transaction. The MTU relates to, but is not identical to the maximum frame size that can be transported on the data link layer, e.g. Ethernet frame.

Question 27

What is DMZ

Answer 27

A DMZ Network is a perimeter network that protects and adds an extra layer of security to an organization’s internal local-area network from untrusted traffic. A common DMZ is a subnetwork that sits between the public internet and private networks.