CCNA Study Ref Basics #3.txt
Card Set Information
CCNA Study Ref Basics #3.txt
Cisco Study Basics
show processes cpu?
Display = Process name/ Process ID -- CPU utilization over 5secs/One min & 5 mins
Open Systems INTERCONNECTION
Which layer of the OSI model defines Token Ring and Ethernet networking standards?
Layer 2 � topology is defined in this layer
Segment length & Speed of 10Base2 (50 ohm coax)?
185 Meters � 10 Mbps
Segment length & Speed of 10Base5 (50 ohm coax)?
500 meters � 10 Mbps
Segment length & Speed of 10BaseT (Cat 3 UTP)
100 meters � 100 Mbps
Segment length & Speed of 100BaseT (Cat 5 UTP)
100 meters � 1,000 Mbps
Segment length & Speed of MM Fiber?
2,000 meters � 1,000 Mbps
Segment length & Speed of SM Fiber?
100,000 meters � 1,000 Mbps
Maximum distance Cat 5 horizontal cabling run?
Patch cords at the horizontal cross-connect are not to exceed?
Patch cords from the wall to the workstation are not to exceed?
What layer are these devices: network adapter, network cable media, repeaters, hubs?
Physical � Layer 1
What layer establishes and managers communications between computers?
The session layer builds and manages communications between 2 devices.
Name the layer that defines Ethernet & Token Ring?
Data Link � Layer 2
The transport layer creates ____, the network layer creates ____, Data Link layer creates ____.
Transport = segments; network = packets; data link = frames; Physical layer = bits
All are called PDU
The distance limit in a wire where the signal begins to fade is called?
Name the most commonly used wiring standard for network media?
EIA/TIA 568a & 568b
Name Cisco�s 3 tiers for hierarchical network design?
Core, Distribution, Access
How does one keep traffic local and reduce collision domains?
What device can connect 2 or more LANS using different protocols?
Logical addresses are used by a router for what reason?
To segment domains
Name the four types of memory used in a Cisco router?
RAM/DRAM, NVRAM, ROM, EPROM
What type of memory stores the Cisco IOS?
Where is the startup configuration stored?
What type of memory stores the operating system image and microcode?
What protocol allows directly connected Cisco devices to learn about each other?
Name the default hold time for CDP?
180 secs (3 mins)
List 4 reasons to segment a network?
Keep local traffic local, increase available bandwidth to each user, Reduce collisions, reduce distance limitation.
Segment a LAN that includes different types of media
Segment a LAN using different protocols (provide those protocols are all routable)
Increases latency because it examines packets before sending.
Can provide more than one active link to a destination.
Where is the running config stored?
RAM/DRAM � also OS, routing tables and other active programs
In what part of memory are these functions stored�.POST, Bootstrap, start-up/power-up utilities, CIOS?
Which of the following is NOT a Transport layer protocol � TCP, ARP, UDP, SPX?
ARP is a Data Link Layer protocol
SPX is a conection-less or connection-oriented protocol?
SPX is a connection-oriented protocol that provides reliable delivery of packets
A protocol that transmits data over a virtual circuit and has a process for error-recovery is:?
Which of the following protocols or standards is not connection-oriented (TCP, SPX, IPX, X.25) ?
IPX is a connectionless protocol
Only this type protocols implement error-recovery?
Connection-oriented � error recovery protocols also require an ack to be sent to the sender using information from the PDU header
Which of the following is NOT an error-checking method (parity bit, hash total, checksum, CRC)?
Hash total is a method used to determinee a checksum but it is NOT an error checking method
Which of the following is NOT a flow control method (buffering, unbuffered, windowing, congestion avoidance)?
Unbuffered doesn�t exist -- Buffering , windowing and congestion avoidance are basic flow control methods
Name the 2 forms of parity bit error checking used to determine whether the correct number of bits in a transmission were received?
Networking parity error checking is EVEN or ODD parity.
Which of the following is NOT a function of the Transport Layer ( Segment and assemble upper-layer applications, transport segments from one host to another, error-recovery, routing) ?
Routing is a network layer function. Transport layer ALSO establishes end-to-end operations
The session layer services chiefly what other layer and what protocol is found there?
It services the presentation layer and NFS and SQL reside here
UDP is connectionless protocol T/F?
ASCII, EBCDIC, JPG & MPG are found at the Presentation Layer T/F?
Buzz words for this layer are path, route & logical addressing ?
Layer 3 � Network layer
What layer is where the hardware address (MAC) is found and where NIC, bridges and switches operate?
Layer 2 � Data Link Layer
Name examples of ROUTED protocols?
IP, IPX, AppleTalk
Name examples of ROUTING protocols?
Only used between routers
Explain the difference between ROUTED and ROUTING protocols?
RoutING protocol is used to help routers building and maintaining routing tables. RoutED protocols are used to identify the network to which a host belongs and the host (require and addressing scheme)
Given an IP address and subnet mask identify the subnet ID of that host, the last USABLE address on that subnet, the subnet broadcast address, and the number of possible subnets and hosts per subnet.
Given an dotted decimal form --- identify the bit count?
Example: 255.255.255.240 = /28
Given a class address indicate which bits must be on / off (Class A, B & C)?
Example Class B has a 10 in the first 2 bits.
Name the 3 classes of routing protocols and list examples of each?
(Distance Vector, Link State & Hybrid) OSPF = Link State, EIGRP = Hybrid, Everything else is distance vector e.g. IGRP and RIP
Of RIP and IGRP which has a lower administrative distance?
Depends �remember static route always is one
Know how to configure RIP & EIGRP?
Which routing protocol uses Bandwidth as its routing metric?
What is the command to display configured DLCI�s on a Frame Relay router?
Sh frame-relay pvc
Explain the troubleshooting of pinging local loopback address (127.0.0.1), NIC card address and another host address?
Successful loopback ping means TCP/IP protocol stack has initialized properly, successful NIC card address ping means NIC card is working. Successful ping to another host indicates connectivity.
Speaking of an ACL, what numbers indicate a standard access list?
Speaking of an ACL, what numbers indicate an extended IP access list?
Speaking of an ACL, what numbers indicate an standard IPX access list?
Speaking of an ACL, what numbers indicate an extended IPX access list?
Speaking of an ACL, what numbers indicate an IPX SAP filter?
List two commands to monitor access lists and explain each?
Show access-lists (shows actual list) and show ip interface (shows placement of list and the direction in which they will work)
In a switched environment a full-duplex interface will experience no collisions T/F?
In a switched environment a half-duplex interface will experience collisions T/F?
True..collisions are experienced between transmit and receive
Excessive broadcasts are a layer 2 problem (T/F)?
Explain where the following configs are stored in a router (startup-config, running-config, IOS image)?
Startup = NVRAM, Running = RAM, IOS Image = FLASH
Can you configure at this prompt router> (Y/N)?
No ..this is not in a config mode
Upon boot a router�s IOS is copied to _____memory and the startup config is copied to ____ memory?
IOS = Flash, startup = NVRAM