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Sample CSV Import > Untitled 17 > Flashcards

Untitled 17 Flashcards

1
Q

__ topology e.g. Ethernet, ATM defines the rules of communication across the __ topology.

A

Logical topology (layer 2), Physical topology (layer 1)

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2
Q

__ applies labels to packets, is commonly used to privately control international networks and is much cheaper than dedicated lines.

A

MPLS (Multi Protocol Label Switching)

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3
Q

__ are asynchronous devices that provide dial-in and dial-out connections.

A

Access servers

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4
Q

__ are distributed series of caching web servers, designed to improve performance and availability by bring data closer to the end user.

A

CDN (Content Distribution Network)

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5
Q

__ are the signaling protocols and __ is the packetization of your voice.

A

SIP and H.323 (which is wrapped around SIP for security), RTP (Real-time protocol)

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6
Q

__ checks a system’s patches, antivirus and local firewall. If the client passes, access is granted, otherwise it is placed on an isolated VLAN where patches and antivirus updates may be provided.

A

NAC (Network Access Control). It builds on top of 802.1X.

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7
Q

__ communications is where data is just sent with no need for start and stop bits. It is more efficient since there is no overhead (start/stop bits) but trasmitting and receiving stations need to be synchronized.

A

Synchronous

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8
Q

__ communications is where data is sent by changes in levels of voltage or current in a sequential fashion. There are start and stop sequence bits.

A

Asynchronous

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9
Q

__ DSL has the same upload and download rates.

A

SDSL (symmetric)

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10
Q

__ DSL is higher download than upload. __ is much higher download than upload rates.

A

ADSL (Asymmetric), VDSL (very-high-data-rate)

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11
Q

__ DSL is used to provide the last mile of T1 service and uses two copper twisted pairs.

A

HDSL (high-rate)

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12
Q

__ extends Fibre channel to Ethernet networks.

A

FCoE (Fibre Channel over Ethernet) since FC was designed for high-performance directly attached storage.

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13
Q

__ integration is a common and phased approach for VoIP. The more long-term solution is __ integration.

A

PSTN PBX/VoIP integration: combines traditional and VoIP networks
IP PBX/PSTN integration:users must use VoIP phones, IP PBX is a soft-switch that routes calls

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14
Q

__ is a helpful network path troubleshooting tool that shows each of the nodes from a local machine to a destination.

A

traceroute, part of ICMP and built on ping

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15
Q

__ is a layer 2 error correction for serial connections.

A

HDLC (High-Level Data Link Control)

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16
Q

__ is a layer 2 polling method for serial connections

A

SDLC (Synchronous Data Link Control)

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17
Q

__ is a simple, weak authentication mechanism that sends the password in plaintext. This can be mitigated by sending a hash of the password but this is still vulnerable to a replay attack.

A

PAP (Password Authentication Protocol)

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18
Q

__ is a TCP-based logon system with robust AAA, which is why Diameter came out.

A

TACACS (Terminal Access Controller Access Control System)

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19
Q

__ is a UDP-based logon system mostly focused on authentication and doesn’t focus much on authorization and accounting.

A

RADIUS (Remote Authentication Dial In User Service)

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20
Q

__ is a vast improvement over WEP, requires NIC replacement and AP replacement or firmware upgrade (AES-CCMP).

A

WPA2

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21
Q

__ is an authentication mechanism that uses challenge/response authentication and is not vulnerable to a replay attack.

A

CHAP (Challenge-Handshake Authentication Protocol). It should be used instead of PAP wherever possible.

22
Q

__ is an authentication mechanism, an extension to PPP and supports a variety of authentication protocols.

A

EAP (Extensible Authentication Protocol

23
Q

__ is an IETF standard (RFC 2401) for establishing encrypted communication between users and devices. It offers sophisticated replay attack prevention and was issued as an open standard thus promoting multivendor interoperability.

A

IPsec VPN

24
Q

__ is an improved version of RADIUS which focuses on all three areas of AAA.

A

Diameter

25
Q

__ is an improvement over WEP (Wired Equivalent Privacy) and compatible with WEP hardware (TKIP).

A

WPA (Wi-Fi Protected Access)

26
Q

__ is built on ping and used to plot the path a packet took through the network.

A

traceroute, part of ICMP and built on ping

27
Q

__ is layer 2 network level authentication to authenticate a device, using MAC addresses (can be spoofed) and/or certificates.

A

802.1X. Using both would be ideal.

28
Q

__ is used to find whether a given Internet host is reachable or not.

A

Ping, part of ICMP

29
Q

__ layer convers bits into electrical signals or light impulses for transmission.

A

Physical Layer 1

30
Q

__ of the OSI model connects the physical part of the network with the abstract part?

A

Data link layer 2

31
Q

__ offers SCSI disk access via TCP/IP and is routed via IP.

A

iSCSI (Internet Small Computer System Interface)

32
Q

__ or __ which are forms of __ should be used for wireless networks where we should have mutual authentication. Otherwise if just using CHAP, the server authenticates the client but the client does not authenticate the server.

A

LEAP (Lightweight Extensible Authentication Protocol or PEAP (Protected Extensible Authentication Protocol), forms of EAP

33
Q

__ topology (layer 1) describes how systems are connected together e.g. bus ring, star.

A

Physical topology (layer 1)

34
Q

__ VPN is also known as Transport Mode.

A

Client-to-site VPN: provide remote access from a remote client such as a traveling sales rep or telecommuting employee.

35
Q

__ VPN is also known as Tunnel Mode.

A

Site-to-site VPN: provide connectivity to networks such as headquarters and a remote office. Gateway devices are located in front of both networks.

36
Q

__, given a MAC address, will find out what the corresponding IP address is.

A

RARP (Reverse Address Resolution Protocol)

37
Q

__, given an IP address, will find out what the corresponding MAC address is.

A

ARP (Address Resolution Protocol), so computer can determine the next hop

38
Q

105.255.255.255 is a Class __ __ broadcast address.

A

Class A directed broadcast

39
Q

150.5.255.255 is a Class __ __ broadcast address.

A

Class B directed broadcast

40
Q

802.11 supports which frequencies and speeds?

A

BAGN: 11,54,54,144+Mbps. 2.4,5,2.4,2.4/5

41
Q

802.11 supports which two physical layers?

A

IR: Infrared, requires line of sight
RF (Radio Frequency): FHSS (Frequency Hopping Spread Spectrum; police on CB radios used to hop to different frequencies every 10 seconds so that’s all you could hear), DSSS (Direct Sequence Spread Spectrum, if you have small channels break up data into pieces and transfer in lots of small chunks)

42
Q

A __ broadcast goes to every system on the LAN

A

limited broadcast. Will not get routed to any other networks

43
Q

A __ broadcast is where the entire address is set to all 1’s or 255.255.255.255.

A

limited broadcast

44
Q

A __ broadcast is where the host portion is set to all 1’s

A

directed broadcast

45
Q

A __ broadcast would be routed to every computer on the destination network.

A

directed broadcast

46
Q

A __ determines the path a packet will take.

A

IP address

47
Q

A __ firewall operates at layer 3.

A

packet filtering

48
Q

A __ firewall operates at layer 4.

A

stateful filtering

49
Q

A __ identifies a device by vendor code (first 3 bytes) and a unique identifier (last 3 bytes).

A

MAC address

50
Q

A __ is a layer 3 device that connects two different networks together and moves packets between networks.

A

Router

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