IST 220 Chapter 7 Quiz
Layer 2 networks operate at the Data Link Layer. They examine and make forwarding or filtering decisions based on information in a protocol data unit (PDU). Where are PDUs located?
Data Link header
Which Layer 2 header contains the 6-byte source and destination addresses that the Ethernet frame is sending to and from?
MAC address
The Spanning Tree Protocol (STP) configuration process has several steps. Each step refines the spanning tree to determine the ebst path through the network. Which of the following is NOT an STP configuration step?
Open other ports
Which IEEE 802.1Q VLAN header field refers to class of service?
Priority Code Point (PCP)
Which Layer 2 header field has a 3-byte organizationaly unique identified (OUI) used to identify the network interface controller (NIC) manufacturer and includes the 2-byte Protocol Type field?
SNAP field
A new or improved physical media solution must meet certain requirements to be an attractive option and to be adopted by the marketplace. Which of the following requirements is msot affected by interference in the enviornment?
Usability
All of the followiing are true of local area networks (LANs), except:
a LAN cannot operate completely on Layer 2 (the Data Link Layer)
when designing Ethernet network redundancy, what can minimize the length of a network outage if a fiber optic backbone cable is cut?
a backup network link
All of the following devices can be powered by Power over Ethernet (PoE) switch ports, except:
analog wall clocks
Susan is a network engineer for a marketing firm with 80 staff members. Ten employees are designers who work with high-resolution media files and streaming video content daily. Their content decreases performance of the overall network. What is the best solution to improve network performance for general users?
create a virtual LAN (VLAN) using dynamic membership for the designers
There are two kinds of Layer 2 swithces: cut-throguh and store-and-forward. A store-and-forward Layer 2 switch
examines the entire fram, stores it in memory, makes a forwarding decision based on the destination MAC layer addresses and the port or itnerface assocaited with that addresses, and performs a checksum validation
True or false? a drawback of virtual LANs (VLANs) is that they increase network congestion and collisions
false
True or false? an all broadcast destination address of EE-EE-EE-EE-EE-EE send ethernet frames out all ports or interfaces on a bridge
false
True or false? switch port secutiry is a software feature in some switches that monitors traffic and disables the RJ-45 port if that port is the srouce of unwanted broadcast transmissions
false
True or false? with STP, the root part on the switch that leads to the root bridge has the highest root path cost
false
true or false? the process of forwarding traffic within a virtual LAN (VLAN) from one switch to another is called VLAN stacking
false
All of the following are true of fault tolerance, excpet:
full redundancy is inexpensive
what combines multiple physical links so they can be used as a single logical link?
link aggregation
All of the following are other terms for link aggregation, except:
link isolation
All of the following are common network resilency methods, except:
single connections between critical nodes
What type of organziation would benefit form departmental LANs using virtual LANs (VLANs) and a collapsed backbone technology?
small and medium sized business (SMB) and enterprise
A ______ is a connection between two switches that transports traffic between the switches. The ports used within the same virtual LAN (VLAN) are called _____. When physical ports are no longer part of that VLAN, the reverse configuration is called ___.
tag link, tagging ports, untagging ports
Wen is a network engineer. He is setting up a LAN. He knows that each network connection must adhere to the distance limitations of the wiring as well as the signaling of the network interface controller (NIC), hub, or Layer 2 switch. What step should he take first?
test and certify the wiring system
Which of the following is NOT true of switching and collision domains?
the fewer nodes on an Ethernet collision domain, the greater the chance of a collision occurring
What is the purpose of Rapid Spanning Tree Protocol (RSTP)?
to make spanning tree convergence faster
True or False? Depending on whether unshielded twisted-pair, shielded twisted-pair, or optical fiber is used, distance limitations define a physical Ethernet collision domain.
true
True or false? A fault-tolerant Internet connectivity solution may include a more expensive high-speed Internet access link supported by a less expensive secondary Internet access link.
true
True or false? Link aggregation allowed switches to communicate along several physical links in parallel
true
True or false? a collision domain is a physical ethernet network
true
True or false? a spanning tree that maps to one or more virtual LANs (VLANs) is called a multiple spanning tree (MST)
true
True or false? a virtual LAN (VLAN) enables certain types of traffic to be isolated to their own collection of ports
true
True or false? a virtual LAN (VLAN) provides the ability to segregate network traffic and increase performance
true
True or false? clustering, or stacking LAN switches, groups switches together in the wiring closet
true
True or false? ethernet LANs are commonly deployed as a series of connected star-wired networks
true
True or false? network resiliency is the ability of the network to maintain availablity and network connectivity
true
True or false? network wiring can be centralized in a wiring closet
true
True or false? one of the most common failures in a network is the medium itself
true
True or false? spanning tree protocol (STP) prevents switching loops by enabling switches (or bridges) to exchange information about detected paths in the network
true
true or false? an enterprise network that spans multiple buildings may connect at the central data center to create a campus collapsed backbone
true
true or false? an internet router that includes a firewall and a Layer 2 switch of local ports is sufficient for many small office/home office environments
true
