Term
| Access Control List (ACL) |
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Definition
A set of rules configured on a router’s interface for specifying
which addresses and protocols can pass through the interface and to which destinations. |
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Term
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Definition
| A value assigned to a routing protocol that indicates its reliability compared with other routing protocols that might be in use on the same router. If a route is derived by using two different routing protocols, the one with the least administrative distance is used. |
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Term
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Definition
The amount of time a switch maintains a switching table entry that hasn’t been
updated. |
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Term
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Definition
| A switch port option used to detect the type of device and cable the switchport is connected to; if necessary, the port swaps its transmit and receive pins, which enables you to use straight through or crossover cables regardless of the type of device you're connecting to the port. |
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Term
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Definition
Communication between a switch and a device connected to a switch
port, in which the switch attempts to set the port’s operating mode to the highest
performance setting the device supports |
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Term
| Automatic Link Aggregation |
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Definition
| A feature that enables you to install multiple NICs in one computer and aggregate the bandwidth so that, for example, you can install two 1Gps NICs and have a total bandwidth of 2Gps to and from that computer. |
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Term
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Definition
| A network under the control of a single administrative entity, such as an organization's internetwork or an ISP's network. |
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Term
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Definition
A mode on a switch port that prevents the switch from forwarding frames
out the blocked port, thereby preventing a switching loop. See also switching loop. |
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Term
| Border Gateway Protocol (BGP) |
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Definition
| An exterior Gateway routing protocol used to exchange routing information between autonomous systems. |
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Term
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Definition
| A router that connects one autonomous system to another - for example, an organization's network to an ISP. |
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Term
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Definition
A condition that occurs when a broadcast frame is forwarded endlessly in
a switching loop. See also switching loop. |
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Term
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Definition
A feature that allows a network adapter to take control of the computer’s
bus to initiate and manage data transfers to and from the computer’s memory, independent
of the CPU. |
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Term
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Definition
| Refers to how fast the routing tables of all routers in an internetwork are updated with accurate information when a change in the network occurs. |
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Term
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Definition
With this switching method, the switch reads only enough of the
incoming frame to determine its source and destination addresses. After the forwarding
location is determined, the frame is switched internally from the incoming port to the outgoing port, and the switch is free to handle additional frames. |
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Term
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Definition
The network address of a network to which the router can forward
packets. |
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Term
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Definition
A routing protocol that routers use to share information about
an internetwork’s status by copying their routing table to other routers with which they share a network. |
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Term
| Exterior Gateway Protocol (EGP) |
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Definition
| A routing protocol category in which the routing protocol is used to exchange routing information between autonomous systems. |
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Term
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Definition
A feature available on some high-end NICs. By installing a second NIC
in a PC, failure of the primary NIC shifts network traffic to the second NIC instead of cutting off the PC from the network. |
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Term
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Definition
| The process whereby a switch forwards a frame out all connected ports. |
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Term
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Definition
With this switching method, the switch reads enough of the
frame to guarantee that it’s at least the minimum size for the network type, reducing the
possibility that the switch will forward a frame fragment. |
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Term
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Definition
An invalid frame that’s damaged because of a collision or a malfunctioning
device. |
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Term
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Definition
| Each router a packet must go through to get to the destination network. |
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Term
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Definition
The total number of routers a packet must travel through to get to its destination
network. |
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Term
| Interior Gateway Protocol (IGP) |
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Definition
| A routing protocol category in which the routing protocol is used to exchange routing information within an autonomous system. |
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Term
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Definition
routing protocol that a router uses to share information with other
routers by sending the status of all its interface links to all other routers in the internetwork.
The status includes link speed, whether the link is up or down, and the link’s network number. |
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Term
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Definition
| A high-end switch with many advanced features that can be configured. |
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Term
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Definition
A numeric value that tells the router how “far away” the destination network is.
It can be composed of values such as the bandwidth of links between the source and
destination, the hop count, and the link’s reliability. |
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Term
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Definition
| In an internetwork, routers sharing a common network. |
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Term
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Definition
An interface name or the address of the next router in the path to the destination
network. |
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Term
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Definition
A feature included on most NICs that enables the card to process
incoming and outgoing network data without requiring service from the CPU. |
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Term
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Definition
A process whereby a router blocks a packet from being forwarded based
on rules specified by an access control list. See also access control list (ACL). |
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Term
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Definition
The process of a router receiving a packet on one port and forwarding
it out another port based on the packet’s destination network address and information in
the routing table. |
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Term
| Path-Vector Routing Protocol |
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Definition
| A routing protocol that analyzes the path to each destination network so that it can form a non looping routing topology. |
|
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Term
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Definition
A bus standard that uses a high-speed serial communication protocol of
one or more lines or lanes. Each lane of PCIe 1.0 can operate at 250 MBps in each
direction. See also Peripheral Component Interconnect (PCI). |
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Term
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Definition
Credit card–sized expansion cards used mainly to add functionality to
laptop computers. The main standards are Cardbus and ExpressCard. Cardbus operates at
33 MHz and supports a 32-bit bus; ExpressCard uses PCIe technology to provide data
transfer speeds up to 500 MBps. |
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Term
| Peripheral Component Interconnect (PCI) |
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Definition
A bus standard used to connect I/O devices to
the memory and CPU of a PC motherboard. PCI is implemented in both 32-bit and 64-bit
versions at speeds of 33 and 66 MHz, respectively. |
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Term
| Peripheral Component Interconnect-Extended (PCI-X) |
|
Definition
A bus standard that’s backwardcompatible
with PCI and supports speeds of 66 to 533 MHz with 32-bit or 64-bit bus
widths. See also Peripheral Component Interconnect (PCI). |
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Term
| Preboot Execution Environment (PXE) |
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Definition
| A feature on some NICs that allows remotely booting an OS stored on a server through the the PC's NIC instead of from local storage. |
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Term
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Definition
A NIC feature for including additional memory to provide temporary
storage for incoming and outgoing data. |
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Term
| Routing Information Protocol (RIP) |
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Definition
A distance-vector protocol that uses hop count as the
metric to determine the best path to a destination network. |
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Term
| Routing Information Protocol version 2 (RIPv2) |
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Definition
A newer version of RIP that supports
a more complex IP addressing scheme and uses multicast packets rather than
broadcasts to transmit routing table updates. See also Routing Information Protocol
(RIP). |
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Term
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Definition
A set of rules routers use to exchange information so that all routers have
accurate information about an internetwork to populate their routing tables. |
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Term
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Definition
A feature on some NICs in which the NIC’s buffers map directly
to RAM on the computer. A computer actually writes to buffers on the NIC instead of
writing to its own memory. |
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Term
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Definition
A feature on some NICs in which a NIC’s onboard processor selects
a region of RAM on the computer and writes to it as though it were buffer space on the
adapter. |
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Term
| Spanning Tree Protocol (STP) |
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Definition
A communication protocol switches use to ensure that they
aren’t connected in a way that creates a switching loop. See also switching loop. |
|
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Term
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Definition
| A routing table entry that’s entered manually by an administrator. |
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Term
| Store-And-Forward Switching |
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Definition
This switching method requires the switch to read the entire
frame into its buffers before forwarding it. It examines the frame check sequence (FCS)
field to be sure the frame contains no errors before it’s forwarded. |
|
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Term
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Definition
A condition that occurs when switches are connected in such a way that
frames can be forwarded endlessly from switch to switch in an infinite loop. |
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Term
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Definition
A switch port configured to carry traffic from all VLANs to another switch or
router. See also virtual local area networks (VLANs) |
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Term
| Universal Serial Bus (USB) |
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Definition
An external PC bus interface for connecting I/O devices. Speeds
range from 12 Mbps in USB 1.0 to 3.2 Gbps in USB 3.0. |
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Term
| Virtual Local Area Networks (VLANs) |
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Definition
A feature on some switches that allows configuring
one or more switch ports into separate broadcast domains. |
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Term
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Definition
| A feature on many NICs that allow an administrator to power on a computer by remotely sending a special packet, called a 'magic packet,' to the NIC's MAC address |
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Term
When a switch receives a frame on a port and floods the frame, what does it do with the frame?
a. Discards it
b. Changes the destination address to FF:FF:FF:FF:FF:FF
c. Forwards it out all other connected ports
d. Clears the switching table and adds the frame source address to the table |
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Definition
| c. Forwards it out all other connected ports |
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Term
You have two eight-port switches. On each switch, seven stations are connected to ports, and the two switches are connected with the eighth port. How many collisions domains are there?
a. 16
b. 15
c. 14
d. 8
e. 1 |
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Definition
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Term
Which of the following is considered a Layer 2 device?
a. Computer
b. Switch
c. Router
d. Hub |
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Definition
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Term
You just purchased some new switches for your company’s network. Your junior technicians are doing most of the work connecting switches to workstations and to each other, and you don’t want to confuse them by requiring them to use both patch cables and crossover cables. How can you test the switches to determine whether you need both types of cable, and what’s the feature for using only one type of cable for all connections?
a. Connect the switch to a PC NIC and configure different speeds on the NIC by using the NIC driver. You’re okay if the switch links at all speeds. It’s called auto-MDIX.
b. Connect two switches by using a crossover cable. If the connection works, the switch supports auto-negotiate.
c. Connect the switch to a PC NIC and configure different speeds on the NIC by using the NIC driver. You’re okay if the switch links at all speeds. It’s called auto-negotiate.
d. Connect two switches by using a patch cable. If the connection works, the switch supports auto-MDIX. |
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Definition
| d. Connect two switches by using a patch cable. If the connection works, the switch supports auto-MDIX. |
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Term
| What feature of a switch keeps switching table entries from becoming stale? |
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Definition
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Term
Which is the fastest switching method?
a. Store-and-forward
b. Fragment-free
c. Cut-through
d. Forward-free |
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Definition
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Term
There can be only one MAC address per port in a switching table.
True or False? |
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Definition
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Term
What does it mean if the first 24 bits of a MAC address are 01:00:5E?
a. The NIC was manufactured by Intel
b. It's a multicast frame
c. It's an Invalid CRC
d. The frame will be flooded |
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Definition
| b. It's a multicast frame |
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Term
What feature should you look for in switches if your network is cabled like the one in
[image]
a. VLANs
b. Auto-negotiate
c. STP
d. Auto-MDIX |
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Definition
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|
Term
What should you configure on a switch that’ s connected to three broadcast domains?
a. IGMP
b. VLANs
c. Port security
d. STP |
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Definition
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|
Term
Which of the following is a Layer 3 device?
a. Router
b. NIC
c. Switch
d. Computer |
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Definition
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Term
What does a router do after receiving a frame on one of its interfaces? (Choose all that apply.)
a. Deencapsulates the frame to create a packet
b. Deencapsulates the packet to create a segment
c. Encapsulates the frame to create a new packet
d. Encapsulates the packet to create a new frame |
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Definition
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|
Term
Which of the following is found in a routing table? (Choose all that apply.)
a. Destination MAC address
b. Port number
c. Metric
d. Next hop
e. Domain name |
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Definition
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|
Term
Which of the following accurately describes a distance-vector routing protocol?
a. OSPF is an example.
b. It learns from its neighbors.
c. It sends the status of its interface links to other routers.
d. It converges the fastest. |
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Definition
| b. It learns from its neighbors. |
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Term
Which of the following is a characteristic of routing protocols? (Choose all that apply.)
a. They populate routing tables statically.
b. Network changes are reflected in the routing table automatically.
c. They’ re not a good solution with redundant routes.
d. They add routing table entries dynamically. |
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Definition
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|
Term
Which of the following is the best routing solution for a network that includes redundant links?
a. RIP
b. STP
c. OSPF
d. Static |
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Definition
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Term
If you don’ t want wireless clients to view the name of your wireless network, what feature should you use?
a. WEP
b. Disabling SSID broadcasts
c. MAC filtering
d. AP isolation |
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Definition
| b. Disabling SSID broadcasts |
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Term
To prevent a wardriver from being able to interpret captured wireless network data, you should enable which of the following?
a. MAC filtering
b. AP isolation
c. WPA or WPA2
d. Repeater mode |
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Definition
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|
Term
What feature can you use to wirelessly connect the wired networks in two buildings?
a. Repeater mode
b. AP isolation
c. Bridge mode
d. VLAN mode |
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Definition
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Term
Which AP feature is useful when you have many guests accessing your network and you don’ t want them to be able to access the computers of other guests?
a. MAC filtering
b. AP isolation
c. Bridge mode
d. VLAN mode |
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Definition
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|
Term
Which PC bus uses up to 32 lanes to achieve very high data transfer rates?
a. PCI
b. PCI-X
c. USB
d. PCIe |
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Definition
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|
Term
Which PC bus allows you to connect a NIC to your computer easily without powering off?
a. PCI
b. PCI-X
c. USB
d. PCIe |
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Definition
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|
Term
Which NIC feature do you need to configure on a thin client?
a. QoS
b. PXE
c. IPSec
d. ACPI |
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Definition
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Term
Which device is used to communicate between broadcast domains? (choose all that apply)
a. Repeater
b. Switch with VLANs
c. Router
d. Switch with STP |
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Definition
b. Switch with VLANs
c. Router |
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Term
What feature should you configure to prevent users on one subnet from accessing the
Web server on another subnet?
a. MAC filtering
b. Access control lists
c. Dynamic routing
d. Spanning Tree Protocol |
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Definition
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