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97 Cards in this Set

  • Front
  • Back
Routers limit network traffic by controlling what?
Broadcast domains
Which layer of the OSI model is responsible for converting frames into bits and bits into frames?
Layer 2 - The data link layer
What scheme suppresses a route announcement out an interface from which the route was learned?
Split Horizon
What four internal routing protocols support VLSM?
EIGRP, IS-IS, RIPv2 and OSPF
When you have configured your router for EIGRP routing, what command is used to configure the gateway of last resort?
ip default-network
What layer of the hierarchical design model implements access lists, distribution lists, route summarization, VLAN routing, security policy and address aggregation?
Distribution layer
Which class of routing protocol periodically sends its routing table to its neighbors: link-state or distance vector?
distance vector
The switch functions of blocking and forwarding that are based on MAC addresses operate at which layer of the OSI model?
Layer 2 - The data link layer
What is the best measurement of reliability and load on an interface?
Rely 255/255, Load 1/255
What OSI layer deals with frames?
Layer 2 - data link layer
What type of routing protocol do you use between autonomous systems?
external gateway protocol (EGP)
Which layer of the OSI model is concerned with data representation, data compression schemes, encryption and voice coding?
The presentation layer, Layer 6
What routing metric is concerned with the time a packet takes to travel from one end to another on the network?
the delay metric
What device controls collision domains but does not control broadcast domains?
bridge
Which routing protocol requires a two layer topology with all areas connecting to the backbone?
OSPF
Which layer of the OSI model does TCP operate in?
Layer 4 - the transport layer
Which OSI layer operates with packets?
Layer 3 - the network layer
What is the cost metric for 10 Mbps ethernet?
cost = 10
In which type of routing protocol does each router advertise its status to all routers in the network, and each router calculates the best routes for the network?
link state routing protocol
What command can be used to configure a default route out interface serial 0?
ip route 0.0.0.0 0.0.0.0 serial 0
A routing protocol that sens out routes with an unreachable metric is using what?
poison reverse
Which hierarchical design model layer has high speed backbone ATM switches with redundant connections?
Core layer
What does OSI stand for?
Open Systems Interconnection
Who developed the OSI model?
The International Standards Organization (ISO)
Which OSI layer describes electrical and mechanical characteristics of network connections?
Layer 1 - Physical Layer
Which OSI layer is responsible for the reliable transport of data across a physical link?
Layer 2 - Data Link Layer
Which OSI layer is concerned with sequencing of frames, flow control, synchronization, error notification, physical network topology, and physical addressing?
Layer 2 - Data Link Layer
The IEEE subdivides the data-link layer into what two
sublayers for local-area networks?
The upper layeris the Logical Link Control (LLC) sublayer, which manages the communications between
devices. The lower layer is the Media Access Control (MAC) sublayer, which manages protocol access to the physical media.
On what OSI layer do these technologies run:

• Frame Relay
• Asynchronous Transport Mode (ATM)
• Synchronous Data Link Control (SDLC)
• High-level data-link control (HDLC)
• IEEE 802.3z and IEEE 802.3ab (Gigabit Ethernet)
• IEEE 802.3u (Fast Ethernet)
• Ethernet version 2
• Integrated Services Digital Network (ISDN)
• Point-to-Point Protocol (PPP)
• Token Ring
• Spanning-Tree Protocol (STP)
Layer 2 - Data Link Layer
Which OSI layer is concerned with the routing of information and methods to determine paths to a destination?
Layer 3 - Network layer
Which OSI layer provides end-to-end error checking and recovery, multiplexing, virtual circuit management,
and flow control? Messages are assigned a sequence number at the transmission end.
Layer 4 - Transport layer
Which OSI layer contains the following technologies:

• Transmission Control Protocol (TCP)
• Real-Time Transport Protocol (RTP)
• Sequenced Packet Exchange (SPX)
• AppleTalk’s Transaction Protocol (ATP)
• User Datagram Protocol (UDP)
Layer 4 - Transport layer
Which OSI layer provides a control structure for communication between applications?
Layer 5 - Session layer
Which OSI layer contains the following technologies:

• NetBIOS
• Real-Time Control Protocol (RTCP)
• Session Control Protocol (SCP)
• AppleTalk’s Zone Information Protocol (ZIP)
• DECnet’s Session Control Protocol (SCP)
• H.323, H.245, H.225
• Real-Time Control Protocol (RTCP)
Layer 5 - Session layer
Which OSI layer ensurea that data sent from a sending application on one system is
readable by the application layer on another system, and provides the conversion of
character representation formats, data compression schemes, and encryption schemes?
Layer 6 - Presentation
Which OSI layer contains the following technologies:

• Abstract Syntax Notation 1 (ASN.1)
• ASCII
• EBCDIC
• Motion Picture Experts Group (MPEG)
• Graphics Interchange Format (GIF)
• Joint Photographic Experts Group (JPEG)
• Tagged Image File Format (TIFF)
• G.711, G.729a, G.726, G.728
Layer 6 - Presentation
Which OSI layer interacts with software applications by identifying communication resources, determining
network availability, and distributing information services?
Layer 7 - Application
Which OSI layer contains the following technologies:
• Telnet
• File Transfer Protocol (FTP)
• Simple Mail Transfer Protocol (SMTP)
• Simple Network Management Protocol (SNMP)
• Network File System (NFS)
• Association Control Service Element (ACSE)
• Remote Operations Service Element (ROSE)
Layer 7 - Application
What is the Hexidecimal digit for the Decimal value 10?
0xA
What is the Hexidecimal digit for the Decimal value 11?
0xB
What is the Hexidecimal digit for the Decimal value 12?
0xC
What is the Hexidecimal digit for the Decimal value 13?
0xD
What is the Hexidecimal digit for the Decimal value 14?
0xE
What is the Hexidecimal digit for the Decimal value 15?
0xF
What is the Hexidecimal digit for the Decimal value 16?
0x10
What are the three layers in the hierarchical model for network design?
Access, distribution and core
In the hierarchical model for network design, which layer has optimal transport, low latency, high availability, and redundancy?
Core
In the hierarchical model for network design, which layer contains no compression, access lists, or encryption?
Core
In the hierarchical model for network design, which layer provides route policies and filtering?
Distribution
In the hierarchical model for network design, which layer contains the following: access lists, distribution lists, route summarization, VLAN routing, security policy, address aggregation, address filters, encryption, compression, and quality of
service (QoS)?
Distribution
In the hierarchical model for network design, which layer uses use workgroup hubs and remote access concentrators?
Access
In the hierarchical model for network design, which layer includes shared and
switched bandwidth, MAC filtering, and segmentation?
Access
Repeaters operate in what layer of the OSI model?
Layer 1 - Physical
Bridges operate in what layer of the OSI model?
Layer 2 - Data link
Each port off a bridge is a separate what?
collision domain
LAN switches that are capable of running routing protocols are called what?
Layer 3 switches
Routing protocols can be labeled in what two categories?
Interior Gateway Protocols (IGPs) or exterior gateway
protocols (EGPs)
What type of routing protocols run the Bellman-Ford algorithms?
distance vector
Which routing protocol is considered a hybrid routing protocol?
EIGRP
What type of routing protocols are these:
• Routing Information Protocol (RIPv1 and RIPv2)
• Interior Gateway Routing Protocol (IGRP)
• Enhanced Interior Gateway Routing Protocol (EIGRP) (could be considered a hybrid)
distance vector
In what type of routing protocol does each router independently calculate
the best path to destinations and maintain a map of the network?
Link state routing protocols
What type of routing protocols are these:
• Open Shortest Path First (OSPF)
• Intermediate System-to-Intermediate System (IS-IS)
Link state routing protocols
What router command permits packets destined for an unrecognized subnet to be forwarded to the best
supernet possible?
ip classless
What type of routing protocols do not advertise subnet masks in their routing updates?
Classful
What type of routing protocols advertise subnet masks in their routing updates?
Classless
What type of routing protocols allow flexible route
summarization and superneting?
Classless
Distance vector routing protocols what to prevent routing loops?
the split horizon technique
What is technique that enables
split horizon to say that the learned route is unreachable.
Poison reverse
Name two classful routing protocols.
RIPv1, IGRP
Name five classless routing protocols.
OSPF, EIGRP, IS-IS, RIPv2, BGP
Which routing metric counts the number of routers that the packet must cross to reach a destination?
Hop count
Which routing metric uses the default or configured interface bandwidth?
Bandwidth
Which routing metric is derived from the bandwidth of the interface. The formula to calculate cost is as follows:
10^8 / BW, where BW is the default or configured bandwidth of the interface?
Cost
Which routing metric is the length in time to move a packet to the destination?
Delay
Which routing metric is the dependability of a network link. Measured with the expected keepalives?
Reliability
Which routing metric refers to the degree to which the interface link is busy?
Load
Which routing loop prevention technique sends update messages immediately for a route for which the metric has changed, sent before the periodic update timer expires?
Triggered update
Which routing loop prevention technique keeps track of router hops as the packet travels through the network. If the maximum limit is reached, the packet is discarded?
Counting to infinity
If the configuration register is set to 0x2101, where is the IOS image booted from?
ROM
Which command copies the IOS image file from a UNIX server into flash?
copy tftp flash
Which switch command’s output is similar to the output of the router show ip interface
brief command?
show port status
What happens if a router’s configuration register is set to 0x2142?
It will boot to the Initial Configuration dialog
After entering the debug ip rip command, no messages appear on your Telnet screen.
What is one likely cause?
The terminal monitor command needs to be configured.
Which two commands verify the configuration register setting for the next reload?
show hardware or show version
Where is the startup configuration usually stored?
NVRAM
Which command configures the enable password on a Catalyst switch?
set enablepass
The configuration register is set to 0x2101. From where does the router boot?
IOS in ROM
What is the purpose of the system bootstrap?
The system bootstrap initializes the CPU and starts the bootloader.
What does the "copy tftp running-config" command do?
Configures the router from a network TFTP server.
If you Telnet to a router that has the login command configured for all vtys but cannot log in, what is missing?
The "password" command. If the login command is configured for all vtys but not the password command, the
router prompts with password not set and disconnects the Telnet session.
Which command sets the configuration register to 0x2102?
router(config)#config-register 0x2102
Which command shows the five second, one minute, and five minute CPU use time for
each process on the router?
show process cpu
Which command shows the memory (allocated/freed/holding) used per process?
show process memory
Where is the IOS image stored?
Flash or ROM
A user telnets to a router that has the password command configured for all vty lines. If the user is granted access with no password, what is missing?
The login command
Which prompt indicates that the router is in ROM monitor mode?
A router is in ROM monitor mode if it has one of the following two prompts:
>
rommon >
What is the procedure for password recovery?
Reboot, break, set 0x2142, reboot, copy password, disable ignore NVRAM, reboot