Exam 4
Refer to the exhibit. How many broadcast domains are displayed?
8 A router defines a broadcast boundary, so every link between two routers is a broadcast domain. In the exhibit, 4 links between routers make 4 broadcast domains. Also, each LAN that is connected to a router is a broadcast domain. The 4 LANs in the exhibit result in 4 more broadcast domains, so there are 8 broadcast domains in all.
Which two previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure?
user data traffic VoIP phone traffic
A local law firm is redesigning the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?
fixed configuration
What does the term "port density" represent for an Ethernet switch?
the number of available ports
What is the destination address in the header of a broadcast frame?
FF-FF-FF-FF-FF-FF
Which network device can be used to eliminate collisions on an Ethernet network
Switch
What is a collapsed core in a network design
a combination of the functionality of the distribution and core layers*
What type of network uses one common infrastructure to carry voice, data, and video signals
converged
What are two advantages of modular switches over fixed-configuration switches?
increased scalability need for fewer power outlets
What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames
ingress port destination MAC address
Which network device can serve as a boundary to divide a Layer 2 broadcast domain
router
Match the functions to the corresponding layers
Access layer represents the network edge provides network access to the user Distribution layer implements network access policy establishes Layer 3 routing boundaries Core layer provides high-speed backbone connectivity functions as an aggregator for all the campus blocks
Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?
SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch When a switch powers on, the MAC address table is empty. The switch builds the MAC address table by examining the source MAC address of incoming frames. The switch forwards based on the destination MAC address found in the frame header. If a switch has no entries in the MAC address table or if the destination MAC address is not in the switch table, the switch will forward the frame out all ports except the port that brought the frame into the switch.
A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic
Segment the LAN into smaller LANs and route between them
What is a definition of a two-tier LAN network design?
distribution and core layers collapsed into one tier, and the access layer on a separate tier
Which type of address does a switch use to build the MAC address table
source MAC address
Refer to the exhibit. Consider that the main power has just been restored. PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request
to Fa0/1, Fa0/2, and Fa0/3 only
What are two reasons a network administrator would segment a network with a Layer 2 switch
to enhance user bandwidth to isolate traffic between segments
Which statement describes a result after multiple Cisco LAN switches are interconnected
The broadcast domain expands to all switches
Which solution would help a college alleviate network congestion due to collisions
a high port density switch
What is a basic function of the Cisco Borderless Architecture distribution layer
aggregating Layer 3 routing boundaries
Match the borderless switched network guideline description to the principle. (Not all options are used.)
allows intelligent traffic load sharing by using all network resources -> flexibility facilitates understanding the role of each device at every tier, simplifies deployment, operation, management, and reduces fault domains at every tier -> hierarchical allows seamless network expansion and integrated service enablement on an on-demand basis -> modularity satisfies user expectations for keeping the network always on -> resiliency
Match the forwarding characteristic to its type. (Not all options are used.)
cut-throught: +appropriate for high perfomance computing applications +forwarding process can be begin after receiving the destination address +may forward invalid frames store-and-forward: #error checking before forwarding #forwarding process only begins after receiving the entire frame #only forwards valid frames
What is one function of a Layer 2 switch
determines which interface is used to forward a frame based on the destination MAC address A switch builds a MAC address table of MAC addresses and associated port numbers by examining the source MAC address found in inbound frames. To forward a frame onward, the switch examines the destination MAC address, looks in the MAC address for a port number associated with that destination MAC address, and sends it to the specific port. If the destination MAC address is not in the table, the switch forwards the frame out all ports except the inbound port that originated the frame.
A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)
easier to provide redundant links to ensure higher availability simpler deployment for additional switch equipment
