相关题目
78、Machine language
77、Control unit
76、Network topology can take a bit of time to understand when you＇re all new to this kind of cool stuff, but it＇s very important to fully understand them as they are key elements to understanding and troubleshooting networks and will help you decide what actions to take when you＇re faced with network problems.There are two types of topology:Physical and Logical.The physical topology of network refers to the layout of cables, computers and other peripherals.Try to imagine yourself in a room with a small network, you can see network cables coming out of every computer that is part of the network, then those cables plug into a hub or switch.What you＇re looking at is the physical topology of that network!Logical topology is the method used to pass the information between the computers.In other words, looking at that same room, if you were to try to see how the network works with all the computers you would be looking at the logical part of the network.The way the computers will be talking to each other and the direction of the traffic is controlled by the various protocols ( ) or, if you like, rules.if we use token ring, then the physical topology would have to change to meet the requirements of the way the token ring protocol works ( ).If it＇s all still confusing, consider this:the physical topology describes the layout of the network, just like a map shows the layout of various rads, and the logical topology describes how the data is sent across the network or how the cars are able to travel ( ) at every road on the map.(5)、If we already know a network’s logical topology, what can we know from it?
76、Network topology can take a bit of time to understand when you＇re all new to this kind of cool stuff, but it＇s very important to fully understand them as they are key elements to understanding and troubleshooting networks and will help you decide what actions to take when you＇re faced with network problems.There are two types of topology:Physical and Logical.The physical topology of network refers to the layout of cables, computers and other peripherals.Try to imagine yourself in a room with a small network, you can see network cables coming out of every computer that is part of the network, then those cables plug into a hub or switch.What you＇re looking at is the physical topology of that network!Logical topology is the method used to pass the information between the computers.In other words, looking at that same room, if you were to try to see how the network works with all the computers you would be looking at the logical part of the network.The way the computers will be talking to each other and the direction of the traffic is controlled by the various protocols ( ) or, if you like, rules.if we use token ring, then the physical topology would have to change to meet the requirements of the way the token ring protocol works ( ).If it＇s all still confusing, consider this:the physical topology describes the layout of the network, just like a map shows the layout of various rads, and the logical topology describes how the data is sent across the network or how the cars are able to travel ( ) at every road on the map.(4)、What is this section mainly talking about?
76、Network topology can take a bit of time to understand when you＇re all new to this kind of cool stuff, but it＇s very important to fully understand them as they are key elements to understanding and troubleshooting networks and will help you decide what actions to take when you＇re faced with network problems.There are two types of topology:Physical and Logical.The physical topology of network refers to the layout of cables, computers and other peripherals.Try to imagine yourself in a room with a small network, you can see network cables coming out of every computer that is part of the network, then those cables plug into a hub or switch.What you＇re looking at is the physical topology of that network!Logical topology is the method used to pass the information between the computers.In other words, looking at that same room, if you were to try to see how the network works with all the computers you would be looking at the logical part of the network.The way the computers will be talking to each other and the direction of the traffic is controlled by the various protocols ( ) or, if you like, rules.if we use token ring, then the physical topology would have to change to meet the requirements of the way the token ring protocol works ( ).If it＇s all still confusing, consider this:the physical topology describes the layout of the network, just like a map shows the layout of various rads, and the logical topology describes how the data is sent across the network or how the cars are able to travel ( ) at every road on the map.(3)、What is the different between logical topology and physical topology?
76、Network topology can take a bit of time to understand when you＇re all new to this kind of cool stuff, but it＇s very important to fully understand them as they are key elements to understanding and troubleshooting networks and will help you decide what actions to take when you＇re faced with network problems.There are two types of topology:Physical and Logical.The physical topology of network refers to the layout of cables, computers and other peripherals.Try to imagine yourself in a room with a small network, you can see network cables coming out of every computer that is part of the network, then those cables plug into a hub or switch.What you＇re looking at is the physical topology of that network!Logical topology is the method used to pass the information between the computers.In other words, looking at that same room, if you were to try to see how the network works with all the computers you would be looking at the logical part of the network.The way the computers will be talking to each other and the direction of the traffic is controlled by the various protocols ( ) or, if you like, rules.if we use token ring, then the physical topology would have to change to meet the requirements of the way the token ring protocol works ( ).If it＇s all still confusing, consider this:the physical topology describes the layout of the network, just like a map shows the layout of various rads, and the logical topology describes how the data is sent across the network or how the cars are able to travel ( ) at every road on the map.(2)、What is logical structure?
76、Network topology can take a bit of time to understand when you＇re all new to this kind of cool stuff, but it＇s very important to fully understand them as they are key elements to understanding and troubleshooting networks and will help you decide what actions to take when you＇re faced with network problems.There are two types of topology:Physical and Logical.The physical topology of network refers to the layout of cables, computers and other peripherals.Try to imagine yourself in a room with a small network, you can see network cables coming out of every computer that is part of the network, then those cables plug into a hub or switch.What you＇re looking at is the physical topology of that network!Logical topology is the method used to pass the information between the computers.In other words, looking at that same room, if you were to try to see how the network works with all the computers you would be looking at the logical part of the network.The way the computers will be talking to each other and the direction of the traffic is controlled by the various protocols ( ) or, if you like, rules.if we use token ring, then the physical topology would have to change to meet the requirements of the way the token ring protocol works ( ).If it＇s all still confusing, consider this:the physical topology describes the layout of the network, just like a map shows the layout of various rads, and the logical topology describes how the data is sent across the network or how the cars are able to travel ( ) at every road on the map.(1)、How many types of topologies have?
75、Online attacks exploit the fact that sensitive data or encryption keys may be present in the system memory in plaintext when an encrypted volume is mounted.Although super user privileges may be required for launching such attacks, we choose not to trust the administrator account.A general key scavenging attack attempts to intelligently run through the system memory ( ) trying to locate and read encryption keys.Any system that requires the communication of key material between kernel-space and user-space components is vulnerable to a general user-space attack, wherein the attacker tries to capture the key when it is present in the address space of an exploitable user-space process.Daemon masquerading is another online attack on schemes that employ a trusted user-space process for key management.An attacker can replace the trusted daemon with a malicious program or launch a man-in-the middle attack on the kernel-space and user-space channel to gain access to encryption keys.In the page cache attack, an attacker may insert and load a malicious kernel module from the user-space at run-time to traverse the page cache and access file contents.Attacks that require super user privileges may be classified.as hard or easy depending on the level of sophistication and effort required to execute them.Although accessing or modifying specific kernel-space data structures of a running system is difficult even for the administrator, exploiting user space vulnerabilities is clearly easy.In a typical compromise, an attacker may gain super user privileges for a short duration and trivially undertake the above attacks.A distinction between the kernel and user-space from a security perspective is becoming crucial as temporary root attacks become common.(5)、What is the paragraph mainly talking about?
75、Online attacks exploit the fact that sensitive data or encryption keys may be present in the system memory in plaintext when an encrypted volume is mounted.Although super user privileges may be required for launching such attacks, we choose not to trust the administrator account.A general key scavenging attack attempts to intelligently run through the system memory ( ) trying to locate and read encryption keys.Any system that requires the communication of key material between kernel-space and user-space components is vulnerable to a general user-space attack, wherein the attacker tries to capture the key when it is present in the address space of an exploitable user-space process.Daemon masquerading is another online attack on schemes that employ a trusted user-space process for key management.An attacker can replace the trusted daemon with a malicious program or launch a man-in-the middle attack on the kernel-space and user-space channel to gain access to encryption keys.In the page cache attack, an attacker may insert and load a malicious kernel module from the user-space at run-time to traverse the page cache and access file contents.Attacks that require super user privileges may be classified.as hard or easy depending on the level of sophistication and effort required to execute them.Although accessing or modifying specific kernel-space data structures of a running system is difficult even for the administrator, exploiting user space vulnerabilities is clearly easy.In a typical compromise, an attacker may gain super user privileges for a short duration and trivially undertake the above attacks.A distinction between the kernel and user-space from a security perspective is becoming crucial as temporary root attacks become common.(4)、In the page cache attack, how to insert and load a malicious kernel module?
75、Online attacks exploit the fact that sensitive data or encryption keys may be present in the system memory in plaintext when an encrypted volume is mounted.Although super user privileges may be required for launching such attacks, we choose not to trust the administrator account.A general key scavenging attack attempts to intelligently run through the system memory ( ) trying to locate and read encryption keys.Any system that requires the communication of key material between kernel-space and user-space components is vulnerable to a general user-space attack, wherein the attacker tries to capture the key when it is present in the address space of an exploitable user-space process.Daemon masquerading is another online attack on schemes that employ a trusted user-space process for key management.An attacker can replace the trusted daemon with a malicious program or launch a man-in-the middle attack on the kernel-space and user-space channel to gain access to encryption keys.In the page cache attack, an attacker may insert and load a malicious kernel module from the user-space at run-time to traverse the page cache and access file contents.Attacks that require super user privileges may be classified.as hard or easy depending on the level of sophistication and effort required to execute them.Although accessing or modifying specific kernel-space data structures of a running system is difficult even for the administrator, exploiting user space vulnerabilities is clearly easy.In a typical compromise, an attacker may gain super user privileges for a short duration and trivially undertake the above attacks.A distinction between the kernel and user-space from a security perspective is becoming crucial as temporary root attacks become common.(3)、How many methods of online attacks have been mentioned in this paragraph?
