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Review. CNIT 106. 1: Introducing Computer Networks. What device connects multiple nodes at layer 1?. Client Server Hub Switch Router . What device lifts packets off one network onto a different network?. Client Server Hub Switch Router .

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Review

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  1. Review CNIT 106

  2. 1: Introducing Computer Networks

  3. What device connects multiple nodes at layer 1? • Client • Server • Hub • Switch • Router

  4. What device lifts packets off one network onto a different network? • Client • Server • Hub • Switch • Router

  5. San Francisco has a 56 km fiber loop connecting government buildings throughout the city. What sort of network is that? • LAN • WAN • CAN • MAN • PAN

  6. What physical topology is used by Ethernet? • Star • Bus • Ring • Full-mesh • Partial-mesh

  7. 2: Dissecting the OSI Model

  8. Which layer uses logical addressing? • Layer 5, 6, or 7 • Layer 4 • Layer 3 • Layer 2 • Layer 1

  9. What layer contains frames? • Layer 5, 6, or 7 • Layer 4 • Layer 3 • Layer 2 • Layer 1

  10. What layer contains bits? • Layer 5, 6, or 7 • Layer 4 • Layer 3 • Layer 2 • Layer 1

  11. Which layer uses MAC addresses? • Layer 5, 6, or 7 • Layer 4 • Layer 3 • Layer 2 • Layer 1

  12. What transmission method is used by Ethernet? • Broadband • Baseband • FDM • TDM • StatTDM

  13. What technique sends multiple signals with different wavelengths through the same medium? • Broadband • Baseband • FDM • TDM • StatTDM

  14. Which protocol has a "window size" field in its header? • TCP • Ethernet • UDP • IP • 802.11

  15. Which protocol has a TTL field in its header? • TCP • Ethernet • UDP • IP • 802.11

  16. Which layer performs encryption? • Layer 7 • Layer 6 • Layer 5 • Layer 4 • Layer 1, 2, or 3

  17. Which layer does routing? • Layer 7 • Layer 6 • Layer 5 • Layer 4 • Layer 1, 2, or 3

  18. Which protocol uses port 443? • HTTP • FTP • Telnet • HTTPS • POP3

  19. 3: Identifying Network Components

  20. What cable has special fire-safety features? • Coax • UTP • STP • Plenum-rated • Fiber optic

  21. What cable uses BNC connectors? • Coax • UTP • STP • Plenum-rated • Fiber optic

  22. What device operates only at layer 3? • Hub • Bridge • Switch • Multilayer switch • Router

  23. Four computers are connected to a hub. How many devices are in the collision domain? • 1 • 2 • 3 • 4 • Some other number

  24. What device assigns IP addresses? • VPN Concentrator • Firewall • DNS server • DHCP server • Proxy server

  25. Which DNS record contains an IPv6 address? • A • AAAA • MX • SOA • CNAME

  26. What protocol is used to ring a VoIP phone? • SIP • PBX • RIP • RTP • BGP

  27. 4: Understanding Ethernet

  28. What is the standard for gigabit Ethernet over copper wire? • 10BASE-T • 100BASE-TX • 100BASE-FX • 1000BASE-LX • 1000BASE-T

  29. What IEEE standard implements VLANs? • 802.1q • 802.1x • 802.11 • 802.3 • 802.11ac

  30. What protocol prevents broadcast storms? • VLAN • Trunk • STP • PoE • 802.1x

  31. 5: Working with IP Addresses

  32. What is 59 in binary? • 0011 1010 • 0011 1011 • 0000 1111 • 0110 0011 • 0011 1001

  33. What is the first usable address in this network?192.168.1.199 /25 • 192.168.1.0 • 192.168.1.1 • 192.168.1.129 • 192.168.1.193 • 192.156.1.255

  34. When you view a Web page, which transmission method are you using? • Unicast • Multicast • Broadcast • Anycast • None of the above

  35. Which technique results in addresses starting 169.254? • DHCP • APIPA • BOOTP • Static addressing • Multihoming

  36. How many bits are in an IPv6 address? • 24 • 48 • 32 • 64 • None of the above

  37. 6: Routing Traffic

  38. Which type of route is the most trusted? • Directly connected • Static • RIP • OSPF • BGP

  39. Which is a distance-vector routing protocol? • Directly connected • Static • RIP • OSPF • BGP

  40. What system conceals internal IP addresses? • NAT • IGMP • ICMP • RIP • SIP

  41. 7: Introducing Wide-Area Networks

  42. Which WAN link allows more than 100 Gbps? • SONET • T1 • T3 • ATM • Frame relay

  43. Which link is used by Ethernet? • UTP • Coax • Fiber optic • Power line • Wireless

  44. Which technology uses a DOCSIS modem? • DSL • PPP • PPPoE • RRAS • Cable

  45. Which system uses 48-byte cells? • Satellite • POTS • ISDN • Frame relay • ATM

  46. 8: Connecting Wirelessly

  47. Which of these was never used on wireless networks? • CSMA/CD • CSMA/CA • FHSS • DSSS • OFDM

  48. Which Wi-Fi standard goes at 11 Mbps? • 802.11a • 802.11b • 802.11g • 802.11n • 802.11ac

  49. Which wireless security technique requires a RADIUS server? • WEP • WPA • WPA2 • MAC address filtering • 802.1x

  50. 9: Optimizing Network Performance

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