INF 681 Network Architecture and Data

Place a check mark beside the statements that are correct regarding an Ethernet MAC address. The right-most 28 bits identify which host is on the Ethernet network and these bits must be unique on the Ethernet network segment. An Ethernet MAC address is 48 bits long. A vendor can have only one vendor code. The left-most 24 bits in an Ethernet Mac address are the vendor's code number.

An Ethernet MAC address is 48 bits long. A vendor can have only one vendor code. The left-most 24 bits in an Ethernet Mac address are the vendor's code number.

Explain in specific step-by-step detail (not more than 1000 words), the process that Jack's computer will use to obtain the MAC address of Jill's computer. The computers are using TCP/IP networking and are on the same local Ethernet network. Jack's computer already knows the IP address of Jill's computer.

Basically, the best way to describe to describe the process that Jack's computer will use to obtain the MAC address of Jill's computer is like this. This is assuming that the computers are using TCP/IP networking and are on the same local Ethernet network. The technique that we will use is use called Address Resolution Protocol (ARP). Jack and Jill's computer will maintain a list of both IP and MAC addresses for each device it has recently communicated with. To give you greater insight, ARP essentially allows Jack's computer to find the MAC address of a node with an IP address on the same physical network. Jack knows Jill's IP node address. Furthermore, ARP uses cache IP-to-MAC address mappings to eliminate repetitive ARP broadcast requests.

Which one of the following is the most likely scenario for a 1400 Octet IPv4 Packet that needs to be sent across a link with an MTU of 1220 octets? Divide the packet into three approximately equal sized fragments of 460 octets each (440 octets of data and 20 octets of header for each fragement). Divide the packet into one 1220 octet fragment (1200 data octets and 20 octets of header) and one 220 octet fragment (200 octets of data and 20 octets of header). Divide the packet into two equal sized fragments of 710 octets each (690 octets data and 20 octets of header each). Discard the packet because it cannot be fragmented on an even boundary of 8 octets.

Divide the packet into one 1220 octet fragment (1200 data octets and 20 octets of header) and one 220 octet fragment (200 octets of data and 20 octets of header).

Each router in the path sends probe packets to determine smallest MTU along the remaining path to determine how to fragment the packet. Router divides packet into smaller fragments that are not larger than the MTU on the next link and the Identification field is used to group the fragments back together by the next router. Routers do not fragment the packets, they return an error to the sender. Host sets up fragmented packets, identifies the fragments by identification number and source IP and the fragments are reassembled by the final router in the path.

Each router in the path sends probe packets to determine smallest MTU along the remaining path to determine how to fragment the packet.

Place a check mark beside each item below that is an invalid IPv6 address. FE80:CAFE:DA8::ICE:FACE:1 FE80:ABCD:BCDE:CDEF:1234:1:12:123 2001::CAFE ::1 DB8:CEDE::2001::FFFF 2002:1100:0000:0000:0001:::1

FE80:CAFE:DA8::ICE:FACE:1 DB8:CEDE::2001::FFFF 2002:1100:0000:0000:0001:::1

QUESTION 1 For each item, select the best definition from the variety of options. IETF De jure standard IRTF Connectionless Delivery Service A. UDP B. Group that coordinates research efforts in solving Internet issues. C. A standard that was produced by efforts that were planned to be standardized from the start and that were the product of a variety of stakeholders. D. Protocol specification based on a vendor's proprietary design. E. TCP F. Task force that manages the variety of standardization efforts of protocols related to the Internet using the Request For Comments (RFC) process. 2 points

IETF - F De jure standard -C IRTF - B Connectionless Delivery Service - A

Explain how IP and ICMP work together?

IP and ICMP work together because ICMP must be included in every IP implementation.  The way this is works is that ICMP allows routers in an Internet to report errors or provide information about unexpected circumstances, the designers call this mechanism Internet Control Message Protocol (ICMP).

What is the first assignable host address that could be used on the 10001000 subnet of 10.0.0.0 when borrowing 8 bits to subnet the address space? 10.128.1.0 00001010 10001000 10001000 00000001 10.136.0.254 00001010 10001000 00000000 00000001 10.0.128.1 00001010 00000000 10001000 00000001

0.128.1.0

Provide your own well written and brief definition for each of the following terms: 1. Soft state 2. Next hop forwarding

1) Soft state- The way in which a receiver times out information, this technique won't depend on the sender to maintain it. 2) Next hop forwarding- A pattern that is used in the Internet, specifically this type of pattern is when a router forwards a packet by the means of one hop.

An IP packet arrives at a router with destination IP address of 192.168.10.8. Which of the following outgoing route choices will the packet be sent on? Send packets destined for network 192.168.0.0/16 out port 1. Send packet destined for network 0.0.0.0/0 out port 2 Send packets destined for network 192.168.8.0/21 out port 3. Send packets destined for network 192.168.10.0/28 out port 4.

Send packets destined for network 192.168.0.0/16 out port 1.

Place a check mark beside each item below that is TRUE. Do not mark items that are false. The de facto size of an Ethernet frame's payload field is 1500 octets. Jitter is a measure of the variation of delay. The destination IP address in an IP packet may be not be changed by a router. There are 2^16 class B addresses. An ARP frame's PROTOCOL TYPE contains 0x0806 (in hexidecimal) to specify that high level protocol address is IPv4. The padding field in an IP datagram, when used, is filled with zeros. An ARP frame will have the value of 1 in the HARDWARE TYPE field when Ethernet is being used. Routers store network addresses in their routing tables rather than host addresses. IPv6 does not specify a broadcast destination address. Ethernet frames are self-identifying while IP Packets are not.

The de facto size of an Ethernet frame's payload field is 1500 octets. Jitter is a measure of the variation of delay. An ARP frame's PROTOCOL TYPE contains 0x0806 (in hexidecimal) to specify that high level protocol address is IPv4. The padding field in an IP datagram, when used, is filled with zeros. An ARP frame will have the value of 1 in the HARDWARE TYPE field when Ethernet is being used. Routers store network addresses in their routing tables rather than host addresses. Ethernet frames are self-identifying while IP Packets are not.

Which one of the following fields is found in both IPv6 and IPv4 packets? Next Header Version Fragment Offset Payload Total Length Flow Label

Version