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50 Cards in this Set
- Front
- Back
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What is X.25?
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The first commercially successful connection oriented packet switching network where packets travel over virtual circuits.
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What is Link Access Procedure Balanced?
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For use in X.25 networks defines frame types and is capable of retransmitting, exchanging, and acknowledging frames as well as detecting out of sequence or missing frames
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What is Frame Relay?
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A high-performance WAN protocol that was originally developed for ISDN and is considered the successor to X.25/LAPB
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At what layer of the OSI model does Frame Relay operate?
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Data link
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What is the maximum effective radius of a Switched Multimegabit Data Service network?
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30 Miles
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What is a Switched Multimegabit Data Service network use for?
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to extend LAN like performance to a MAN or WAN
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Describe an ATM network
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High-bandwidth, low delay technology that uses both switching and multiplexing. It uses 53-byte fixed size cells instead of frames
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What is a multiplexer?
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It enables several signals to be sent over one physical
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What are the private IP address ranges?
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10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255 |
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What are the two primary types of ISDN interfaces?
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Basic Rate Interface and Primary Rate Interface
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How many channels (up/down) comprise a Basic Rate Interface?
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Two B & one D
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How many channels (up/down) comprise a Primary Rate Interface?
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1 Single D channel + 23/30 channels for voice and data
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What layer does the Point to Point Protocol operate at?
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Data Link
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What is the main difference between Layer 2 and Layer 3 tunneling protocols
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Layer 2 protocols use frames and Layer 3 protocols use headers
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IPSEC can support multiple ______ but not multiple _________
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simultaneous tunnels; multiple protocols
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To create an IPSEC tunnel that provides source authentication and integrity without encryption which protocol would I enable?
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AH
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To create an IPSEC tunnel that provides authentication, integrity and encryption what protocol would I use?
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ESP
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What is the early de facto standard for dial up communications
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SLIP
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What succeeded SLIP?
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PPP
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What type of authentication does PPP use?
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PAP, CHAP and MS-CHAP
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How does CHAP protect against replay attacks?
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It does not send the password in clear text an it uses an arbitrary challenge string for each authentication attempt
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How does CHAP prevent against remote client impersonation?
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By sending challenge strings at random intervals.
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What RFC defines CHAP/PAP
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RFC1334
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What is one advantage of MS-CHAP V2 over regular MS-CHAP/CHAP?
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Mutual authentication support
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What extention to EAP allows for authentication using digital certificates?
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EAP-TLS
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It can be said that TACAS and RADIUS are "standards based"...what does that mean?
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That they can interoperate with other systems of the same time.
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Is RADIUS TCP or UDP?
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UDP
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Why is RADIUS not used for router-to-router authentication?
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It does not provide support for two-way authentication
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What does TACAS+ provide that TACAS does not provide?
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two factor password authentication
the ability for a user to change thier password the capability for resynchronizing security tokens better audit trails |
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RAID 0
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Striping
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RAID 1
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Mirroring
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RAID 2
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Hamming Code Parity (bit-interleaved parity)
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RAID 3
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Byte Level Parity
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RAID 4
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Block Level Parity
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RAID 5
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Interleave Parity
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What is te most common implementation of RAID
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RAID 5
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What is the difference between remote journaling and electronic journaling?
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Electronic vaulting happens at pretimed intervals whereas remote journaling is real time
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802.11a
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54 Mbps in the 5GHZ range
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802.11b
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11 Mbps
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802.11g
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54 Mbps in 2.4 GHZ band
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802.15
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PANs
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What is 802.1X
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Port based authentication for security in wireless networks
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What is LEAP
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it dynamically creates WEP keys making WEP more secure.
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What are the two different spread spectrum technologies in use in 2.4GHZ LANs
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Direct-dequence spread spectrum(DSSS) and frequency hopping spread spectrum (FHSS)
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How many non-overlapping channels are used in DSSS?
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Typically 3
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What are the FCC regulations for FHSS networks?
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75 or more frequencies can be used with a maximum dwell time of 400ms
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What are the five layers of WAP?
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application, session, transaction, security and transport
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What does the application layer of WAP consist of?
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The wireless application environment (WAE), a microbrowser specification for internet access, wireless markup language, WMLScript
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What does the Transport layer of the WAP consist of?
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Wireless Datagram Protocol
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What are the three classes of WTLS security?
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Class 1: anonymous authentication
Class 2: Server Authentication Class 3: Two-way client and server authentication |
