Missed Questions Network+

Class B

128-191

E3 Speed

34.4 Mbps

T3 Speed

44.7 Mbps

Primary Rate Interface (PRI)

A telecommunications interface standard used on an Integrated Services Digital Network (ISDN) designed for larger organization to take advantage of digital PBX systems

DS3

Digital signal level 3. A 44.736-Mbps line from the telco, with 28 DS1 channels plus overhead. Also called a T3.

Block ICMP at the firewall

How do you protect a network from ping sweeps?

Copper based networks

Less expensive, limited bandwidth, and max cable segment length compared to optical fiber networks. Used for last-mile cable runs.

SSH tunneling

Network protocol deliver protocol encapsulates a different payload protocol

Time Division Multiplexing (TDM)

Which of the following technologies deliver multiple voice calls over a copper wire if you have an ISDN or T-1 connection?

BaseT

Twisted Pair

channel bonding

Two channels that do not overlap are used together in an effort to double the physical data rate (connection speed).

convergence

When all routers have exchanged routing information with all other routers within a network.. In other words: all routers "agree" on what the network topology looks like.

LLDP (Link Layer Discovery Protocol)

vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet

Material Safety Data Sheet (MSDS)

information sheets that must be provided by the manufacturer for all hazardous products

Class A

1-126

10GBaseSR

10 Gb/s Ethernet over MMF. Max length 400 meters.

Class C

192-223

Class B addresses

A block of iP addresses from 128.0.0.0 to 191.255.255.255 that provides a good balance between the number of networks and the number of nodes per network-16,382 networks of 65,534 nodes each.

10GBaseT

A 10 GbE standard designed to run on CAT 6a UTP cabling. Maximum cable length of 100 m.

H.323

A VoIP standard that handles the initiation, setup, and delivery of VoIP sessions.

Class C addresses

A block of IP addresses from 192.0.0.0 to 223.255.255.255 that provides the largest number of networks (2,097,150) and the smallest number of nodes per network (254).

Class A addresses

A block of iP addresses from 1.0.0.0 to 127.255.255.255 that provides the largest number of nodes (16,777,214) for the smallest number of networks (126), thus increasing the number of nodes per network.

RG-6

A coaxial cable that uses F-type screw-on connectors. It is used for digital data, such as from a cable TV company.

Integrated Services Digital Network (ISDN)

A communication standard for sending voice, video or data over digital telephone lines (PSTN).

legal hold

A court order to maintain data for evidence.

Lucent connector (LC)

A fiber-optic connector that has a snap coupling and, at 1.25 mm, is half the size of the SC connector. Also called a local connector. (13)

DSCP (Differentiated Services Code Point)

A field in an IP packet that enables different levels of service to be assigned to network traffic.

ASN (autonomous system number)

A globally unique number that identifies an autonomous system. Work similarly to IP addresses that identify individual nodes on a network. Now consists of 32 bits instead of 16 bits, and they are assigned by IANA and distributed by the RIR.

CSMA/CD (Carrier Sense Multiple Access/Collision Detection)

A media access control method used most notably in early Ethernet technology for local area networking. It uses carrier-sensing to defer transmissions until no other stations are transmitting.

split horizon

A method for preventing routing loops. This Layer 3 technology is employed by distance-vector routing protocols to ensure that a router knows which of its interfaces received a routing update so the router will not retransmit that same update back on the same interface.

CSMA/CA (Carrier Sense Multiple Access w/Collision Avoidance)

A network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by beginning transmission only after the channel is sensed to be "idle".

Port scanner

A network technician needs to identify active services that should be disabled on the network. What tool would BEST accomplish this?

interface link status

A network technician receives the following alert from a network device: "High utilization threshold exceeded on gi1/0/24: current value 8463257.54" What is being monitored to trigger the alarm?

Asynchronous Transfer Mode (ATM)

A network technology used for connecting devices on a WAN, used in SONET networks, 53-byte data transfer unit, Data transfer rates of up to 10 Gbps

BGP (Border Gateway Protocol)

A path-vector protocol used by ISPs to establish routing between one another. Used to route data between autonomous systems (AS).

Business Continuity Plan

A plan for how an organization will recover and restore partially or completely interrupted critical function(s) within a predetermined time after a disaster or extended disruption

VNC (Virtual Network Computing)

A platform-independent desktop sharing system.

wavelength mismatch

A problem created when transmissions are optimized for one type of cable, such as SMF, but sent over a different type of cable, such as MMF.

smart jack

A remote-line diagnostic device placed at the joining point between an ISP's line and customer's premises wiring is known as:

Ferrule Connector (FC)

A screw-type optical fiber connector that features a keying mechanism. Typically designated as FC/PC, FC/SPC, or FC/APC to denote physical contact, super physical contact, or angled physical contact, respectively.

DHCP Relay

A service that relays DHCP requests to DHCP servers that exist in remote networks

LWAPP (Lightweight Access Point Protocol)

A wireless protocol created by Cisco that makes centralized wireless management possible. Directs all wireless frames to the wireless controller by adding extra headers to the frames, but it is also considered a lightweight protocol because the headers are relatively small.

Server Secret Key

AAA Through RADIUS uses a

169.254.x.x

APIPA Address

Straight Tip (ST)

An older bayonet style connector widely used with multimode fiber.

#,G,Base

Baseband, assume MBits unless there's a "G"

VTP (VLAN Trunking Protocol)

Cisco's protocol for exchanging VLAN information over trunks. Allows one switch on a network to centrally manage all VLANs.

Baseline review

Comparing actual network performance to your security baseline.

Codec

Compression/Decompression or Coder/Decoder. Videoconferencing standard, included in hardware and/or software, used to compress or code video, audio, and data signals for transmission and decompress or decode the signal at the other end of the transmission.

T1 connection

Dedicated phone line with 24 RJ-11's. Also known as Trunk Lines.

AP isolation

Each client connected to the AP will not be able to communicate with each other, but they can each still access the Internet.

Point-to-Point Protocol (PPP)

Enables encapsulation of IP traffic, used for establishing a direct connection between two network devices, used for connecting devices on a WAN

BaseER

Extended Range (singlemode)

BaseF

Fiber

OC-12

Fiber Optic 622.08 Mbps

ATM Cell

Fixed length cell (frame) used to transmit data to reduce variability in transmission delay. 53 Bytes total w/ a 48 Byte payload.

Straight through

If you're connecting a router/computer to a switch/hub, what type of cable would you need?

Crossover

If you're connecting a switch/hub to a switch/hub, what type of cable would you need?

MIMO (multiple input-multiple output)

In the context of 802.11n wireless networking, the ability for access points to issue multiple signals to stations, thereby multiplying the signal's strength and increasing their range and data-carrying capacity. Because the signals follow multipath propagation, they must be phase-adjusted when they reach their destination.

DOCSIS (Data Over Cable Service Interface Specification)

International standard for broadband cable

636

LDAPS Port Number

QoS Layer operation

Layer 2 and 3, sometimes 7 when specified

Autonomous System (AS)

One or more networks that are governed by a single protocol, which provides routing for the Internet backbone. A collection of networks within the same administrative domain.

51.84 Mbps

Optical Carrier (OC) transmission rate specifications adhere to a pattern where the OC prefix is followed by a number designating a multiple of the base unit of

Frame Relay

Packet switching method. A network technology used for connecting devices on a WAN, Data transfer rates of up to 45 Mbps

Multiprotocol Label Switching (MPLS)

Packet switching method. Enables delivery of various data packet types over the same network link, designed to simplify and improve routing performance.

Sticky MAC

Persistent MAC learning is a port security feature that enables an interface to retain dynamically learned MAC addresses when the switch is restarted or if the interface goes down and is brought back online. This is a security feature that can be used to prevent someone from unplugging their office computer and connecting their own laptop to the network jack without permission, since the switch port connected to that network jack would only allow the computer with the original MAC address to gain connectivity.

BaseSR

Short Range (multimode)

SIEM (Security Information and Event Management)

Software that can be configured to evaluate data logs from IDS, IPS, firewalls, and proxy servers in order to detect significant events that require the attention of IT staff according to predefined rules.

802.1D

Spanning Tree Protocol

Syslog

System Log

DLP (Data Loss Prevention)

System or set of rules designed to stop leakage of sensitive information. Usually applied to Internet appliances to monitor outgoing network traffic.

RS-232

The recommended standard (RS) upon which all serial communication takes place on a PC.

subscriber connector (SC)

This is sometimes referred to as square connector or standard connector. It is a widely adopted LAN and WAN connector that uses a push-pull mechanism to ensure positive insertion. This connector type is used with multimode and single-mode fiber.

L2TP (Layer 2 Tunneling Protocol)

UDP 1701 tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs

Layer 2 (Data Link)

What layer does CoS operate within?

fiber optics

Used for network backbone cabling, immune to EMI, higher security and more suitable to carrying digital info than copper.

Layer 3 (network)

What layer does DSCP operate within?

568A

WG, G, WO, Bl, WBl, O, WBr, Br. Go Bob, odd stripe, even solid

568B

WO, O , WG, Bl, WBl, G, WBr, Br. GO swap

ACL

What must be added to a VLAN with a gateway to add security to it?

load balancing

What describes a design where traffic is shared between multiple network servers to provide greater throughput and reliability?

Loopback

What describes an IPv6 address of ::1?

DMVPN (Dynamic Multipoint VPN)

Which VPN type enables direct communication links between remote hosts on a WAN?

WWAN (Wireless Wide Area Network)

Which WAN technology takes advantage of cell towers that provide wireless signal coverage for mobile devices?

ISAKMP (Internet Security Association and Key Management Protocol)

Which encryption type MOST likely is used for securing the key exchange during a client-to-server VPN connection?

-b

Which netstat parameter allows to display the names of applications and executable file components that are accessing the network?

PPPoE (Point-to-Point Protocol over Ethernet)

Which network protocol enables encapsulation of PPP frames within 802.3 frames?

5060 SIP

Which port should be allowed to provide access to certain VoIP applications?

Private IaaS

With private cloud, you have a lot more control, as the infrastructure is exclusive to you and is often stored within a data centre or can be in your own offices

Public IaaS

With public cloud, your resources are owned by the cloud provider (AWS, Google, Azure etc.)

STP

You are setting up uplink ports for multiple switches to communicate with one another. All of the VLANs should communicate from the designated server switch. What should be set on the uplink ports if VLAN 1 is not the management VLAN?

POTS (plain old telephone service)

a connection that is extremely slow, but is available wherever there is a telephone; a modem uses the telephone line to transmit and receive data; this method of connection is known as dial-up. Only requires 2 pins (send and receive)

Storage Area Network (SAN)

a high-speed network with the sole purpose of providing storage to other attached servers

Discovery Protocol

allows peers to discover services provided by other peers in the network

RTP (Real-time Transport Protocol)

defines a standardized packet format for delivering audio and video over IP networks

Satellite

high signal latency, weather dependent, high cost compared to terrestrial links

LACP (Link Aggregation Control Protocol)

provides a method to control the bundling of several physical ports together to form a single logical channel

Ediscovery

refers to the ability of a company to identify, search, gather, seize, or export digital information in responding to a litigation, audit, investigation, or information inquiry

unified communications (UC)

the integration of communication channels into a single service