Chapter 3 Review Questions

When a hosts station NIC is connected to a HUB, this link should use ____ transmission. A. Half-duplex B. Full-duplex C. partial duplex D. simplex E. partial simplex

A. Half-Duplex

The MAC protocol, CSMA/CD is activated by the host station when it is connected to a ____? A. switch B. hub C. bridge D. either a switch or a hub E. router

B. Hub

Which protocol is used to find the MAC address of a computer based on its IP Address? A. HTTP B. TCP C. ARP D. IP E. CSMA/CD

C. ARP

If the wireless access point connects two different LAN standards, generally ethernet and wifi, then it must be a type of _____? A. router B. hub C. bridge D. gateway E. switch

C. Bridge

Choose the correct statement about the switch? A. The switch cannot be assigned an IP address B. The switch is also known as a multiport repeater C. The switch port mostly operates in the full-duplex mode. D. CSMA/CD is used to avoid frame collisions when a network is running on a switch E. The risk of frame collisions gets higher as the number of hosts attached to a switch increases.

C. The switch port mostly operates in the full-duplex mode.

Which may not be an advanced router function? A. ACL for packet filtering. B. Networking address translation between private and public IPs C. Provision of dynamic Ips to requesting stations using DHCP. D. Intrusion detection and prevention. E. Automatic assignment of an IP address to the router.

A.

A switch has 8 Gigabit LAN ports. What is the wire speed and forwarding rate? Also what is the aggregate throughput rate in order for the switch to be 80% non blocking? A. 1 Gbps, 8Gbps, 6.4Gbps B. 1Gbps, 1 Gbps, 8 Gbps, C. 1Gbps, 16Gbps, 1.6Gbps D. 2Gbps, 16Gbps, 6.4Gbps E. 2Gbps, 8Gbps, 8Gbps

A. 1Gbps, 8Gbps, 6.4Gbps

How does a Layer 3 switch differ from a Layer 2 switch? A. The layer 3 switch has more ports than the layer 2 switch. B. The layer 3 switch has more throughput than the layer 2 switch. C. The layer 3 switch port has better network management capability than a layer 2 switch. D. The layer 3 switch port can be either a switch port or a router port E. The layer 3 switch port has higher security than a layer 2 switch port.

D. The layer 3 switch port can be either a switch or a router port.

Choose the correct statement about the operating system of an intermediary device? A. Hubs and repeaters need an OS to function B. The switches OD does not allow modifications of its port security C. The routers OS is about the same size as windows or linux developed for the personal computer D. The routers OS is generally stored in the nonvolatile flash memory E. When the router is powered on, the OS stored on its hard disk drive is copied into RAM

D. The routers OS is generally stored in the nonvolatile flash memory.

The router uses ARP _____ A. to notify its presence when it becomes active. B. to notify that it will become inactive soon C. every time it forwards an IP packet to a host D. whenever it has to broadcast an IP packet E. when it needs to forward an IP packet to another router whose MAC address is not available.

E. When it needs to forward an IP packet to another router whose MAC address is not available.

Imagine a 50% nonblocking ethernet switch with 24 ports, each port with a speed of 100Mbps. What can be the switches aggregate throughout? A. 24 ports B. 100Mbps C. 200Mbps D. 1200 Mbps E. 2400 Mbps

D. 1200Mbps

Which protocol uses broadcasting? A. Simple mail transfer protocol(SMTP) B. HTTP C. TCP D. ARP E. ICMP (internet control message protocol)

D. ARP

Which of these may be an adequate naming of a routers WAN port? A. Fast Ethernet 0/0 B. Console Port C. Auxiliary Port D. Serial 0/0 E. Fiber 0/1

D. Serial 0/1

A switch jas 8 Gigabit LAN ports. What aggregate throughput is needed to give the switch 100% nonblocking capacity? A. 6.4Gbps B. 8.0 Gbps C. 8.4 Gbps D. 4.0 Gbps E. 3.2 Gbps

B. 8 Gbps

When switching and routing are compared: A. Both switching and routing are data link layer concepts. B. Networks relying on switching can be more vulnerable to a single point of failure than those relying on routing. C. Both switching and routing are internet layer concepts. D. Switching is connectionless but routing is connection-oriented. E. Both switching and routing presume availability of multiple active delivery paths between two hosts.

B. Networks relying on switching can be more vulnerable to a single point of failure than those relying on routing.

The difference between asymmetric and symmetric switches is judged by _____ A. accessibility to the operating system B. available port speeds C. number of ports D. expandability of port density. E. operational layers(layer 2 vs 3)

B. available port speeds

Which intermediary device deines the boundary of a broadcast domain? A. switch B. repeater C. hub D. router E. modem

B. repeater

The ____ restricts frame delivery between two host stations to a single path. A. modem B. switch C. router D. layer 3 switch E. CSU/DSU

B. switch

Which is correctly paring an intermediary device with its standard layer? A. hub: layer 2 B. switch: layer 3 C. bridge: layer 2 D. router: layer 2 E. repeater: layer 2

C. Bridge: layer 2

Cut through switching is when: A. All switch ports use the same wire speed. B. switch ports have different wire speeds C. the switch forwards a frame without waiting for its arrival in its entirety D. there is no switch learning or aging. E. switch ports have different throughputs.

C. The switch forwards a frame w/out waiting for its arrival in its entirety