CCNA 1
Terms
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- ___ are designed to operate over large, geographically seperated areas.
- WAN'S
- Type of data at level 4 Transport?
- Segment
- Type of data at level 3 Network?
- Packet of Datagram
- Type of data at level 2 Data Link?
- Frame
- Type of Data at level 1 Physical?
- Bit
- OSI level 7?
- 7 - Application
- OSI Level 6?
- 6 - Presentation
- OSI level 5?
- Session
- Which layer handles physical addressing,network topology, network access and flow control?
- 2 - Data link
- ____ wraps data with the necessary protocol information before network transit.
- Encapsulation
- At what level is the network address added?
- 3 - Network
- At what level is the local address added?
- Data link
- What does PSTN stand for?
- Public Switched Telephone Network
- What is DMA?
- Direct Memory Address
- What does MAC stand for?
- Media Access Control
- How long is a MAC address?
- 48 bits or 6 octets
-
In boolean logic NOT
Input = 0 output = _ - 1
-
In boolean logic NOT
Input = 1 output = _ - 0
-
In boolean logic AND
Input = 0,1
Output = _ - 0
-
In boolean logic AND
Input = 1,1
Output = _ - 1
-
In boolean logic AND
Input = 1,0
Output = _ - 0
-
In boolean logic AND
Input = 0,0
Output = _ - 0
-
In boolean logic OR
Input = 0,1
Output = _ - 1
- What is ISDN?
- Integrated Services Digital Network
- Some common WAN technologies?
-
Modems
Integrated Services Digital Network (ISDN)
Digital subscriber line (DSL)
Frame Relay
T1, E1, T3, and E3
Synchronous Optical Network (SONET) - What is DSL?
- Digital subscriber line (DSL)
- kbps how many bits per second?
- 1,000
- Mbps how many bits per second?
- 1,000,000
- Gbps how many bits per second?
- 1,000,000,000
- Tbps how many bits per second?
- 1,000,000,000,000
-
____ Layer provides:-
Reliable transfer of data across media.
Physical addressing, network topology, line discipline, error notification, ordered delivery of frames, and flow control - 2 - Data Link
-
____ Layer provides:-
Binary Transmission - 1 - Physical
-
____ Layer provides:-
Network Addressing and Best path determination - 3 - Network
-
____ Layer provides:-
End to end connections - 4 - Transport
-
____ Layer provides:-
Interhost Communication - 5 - Session
-
____ Layer provides:-
Data representation - 6 - Presentaton
-
____ Layer provides:-
Network access to applications - 7 - Application
- What is Attenuation?
- The decrease in signal amplitude over the length of a link
- What is impedance?
- Measurement of the resistance of the cable to alternating current, measured in ohms
- What is insertion loss?
- The combination of the effects of signal attenuation and impedance discontinuities.
- What is TIA/EIA-568-B?
- Cable testing standard for high speed Ethernet LANs
- What does TIA/EIA-568-B measure?
-
Wire map
Insertion loss
Near-end crosstalk (NEXT)
Power sum near-end crosstalk (PSNEXT)
Equal-level far-end crostalk (ELFEXT)
Power sum equal-level far end crosstalk (PSELFEXT)
Return loss
Propagation delay
Cable length
Delay skew - In which situation is 10Mbps Ethernet typically used?
- End user and user level switch
- In which situation is 100Mbps Ethernet typically used?
- Workgroup and for servers
- In which situation is 1000Mbps Ethernet typically used?
- High speed backbone
-
Type of cable?
Switch to router - Straight
-
Type of cable?
Switch to PC or Server - Straight
-
Type of cable?
Hub to PC or Server - Straight
-
Type of cable?
Switch to Switch - Crossover
-
Type of cable?
Switch to Hub - Crossover
-
Type of cable?
Hub to Hub - Crossover
-
Type of cable?
Router to Router - Crossover
-
Type of cable?
PC to PC - Crossover
-
Type of cable?
Router to PC - Crossover
- What is DTE?
-
Data Terminal Equipment
End of the users device on the WAN link
Typically the router - What is DCE?
-
Data Communications Equipment
End of the WAN providers side of the cmmunication facility
Responsible for clocking - What is CSU/DSU?
-
Channel service unit/data service unit
Performs signal clocking - IEEE name for fast Ethernet?
- 802.3u
- IEEE name for 100BASE-T Ethernet?
- 802.3i
- IEEE name for 1000BASE-T Ethernet?
- 802.3x
- What is LLC?
-
Logical Link Control
Handles error control, flow control, framing. - Ethernet resides at which level(s) os the OSI model?
-
1 - Physical
2 - Data Link - Parameters for 10-Mbps Ethernet?
-
Bit time - 100nsec
Slot time - 512 bit-times
Interframe timing - 96 bits
Collision attempt limit - 16
Collision backoff limit - 10
Collision jam size - 32 bits
Maximum untagged frame size - 1518 Octects
Minimum frame size - 512 bits - Switch modes?
-
Store and forward
Cut-through switching
Fragment free switching - Layer 2 bridging, MAC address unknown, what happens?
- Broadcast to all devices except the one on which it was recieved.
- Layer 2 devices?
-
Bridge and Switch
Segment the network - TCP/IP model layers?
-
Application
Transport
Internet
Network Access - TCP/IP model Network Access layer Protocols?
-
Ethernet
Fast Ethernet
SLIP and PPP
FDDI
ATM, Frame Relay and SMDS
ARP
Proxy ARP
RARP - WHAT IS DHCP?
- Dynamic Host Configuration Protocol
- What is ARP?
- Address Resolution Protocol
- When sending an ARP request, what MAC address does the source use?
- FF-FF-FF-FF-FF-FF, the broadcast address.
- What is UDP?
- User Datagram Protocol
- Which application layer protocols use UDP?
-
Trivial File Transfer Protocol (TFTP)
Simple Network Management Protocol (SNMP)
Dynamic Host Configuration Protocol (DHCP)
Domain Name System (DNS) - What is TFTP?
-
Trivial File Transfer Protocol
It uses UDP
Port number 69 - What is SNMP?
-
Simple Network Management Protocol
It uses UDP
Port number 161 - What is DNS?
-
Domain Name System
It uses UDP
Port number 53 - What is HTTP?
- Hypertext Transfer Protocol
- What does "http://" do?
- Identifies to the browser what protocol should be used
- What is SMTP?
-
Simple Mail Transfer Protocol
It uses TCP
Port number 25 - What is POP3?
-
Post Office Protocol Version 3
It uses TCP
Port number 110 - What is IMAP4?
-
Internet Messaging Access Protocol Version 4
It uses TCP